my Yamaha 175

[lookinforone]

hey all. im kinda new. was on here a couple years ago, but gave up on a trike. well ive since moved and just picked this up today from my dads buddy.

http://www.supermotors.net/getfile/734254/fullsize/dsc_1726.jpg
http://www.supermotors.net/getfile/734255/fullsize/dsc_1727.jpg
http://www.supermotors.net/getfile/734256/fullsize/dsc_1728.jpg
http://www.supermotors.net/getfile/734257/fullsize/dsc_1729.jpg
http://www.supermotors.net/getfile/734258/fullsize/dsc_1730.jpg


the only problem is that it wont start. previous owner said its a carb problem. well i took the carb apart and cleaned it all out pretty good. still wont start. and it is getting spark and fuel.

http://www.supermotors.net/getfile/734272/fullsize/dsc_17331111.jpg
so in this image. im guessing the yellow circle is the adjustment for air/fuel ratio?
and the red one is idle, correct?

[Vealmonkey]

You are correct. What kind of shape is the airfilter in? Is the airbox all nice and cleaned out? Does the intake tube above the fuel tank and under the fuel tank cover have any obstructions in it? Sounds like you are heading in the right direction. You need to get that paint cleaned off those plastics though. It's not a hopeless trike at all, lots of potential. Also you may have to use some "soft scrub" kitchen cleaner and some 3m pads to get all that paint off the plastics. And as far as the chrome goes, you will want to use some 000 steel wool and that trike should clean up nicely. The 175 is a 2 stroke. Make sure the oil injection tank has 2 stroke oil in it or make sure you have 2 stroke oil mixed in the gas or you won't be very happy since it will cause the engine to seize.

[daniel_250r]

it could have something to do with low compression my tri moto 125 wouldnt start unless towed or bump started

[Yamada]

trailpro trailpro
It is a start for rider. Keep us posted on your progress.

[Macs]

Is your plug getting wet? How is the compression? I had a huge problem with the fuel pump on mine. It would work great then stop.

[outtaline]

don't dog thetrailpro trailpro for the every day rider they are fine and will outlast most trikes and they will eat just about everything

[lookinforone]

the air filter looked good.
i wanna get it running and what not before i mess with the plastics.
but the paint is definately coming off. gotta cover the yellow up for sure.
its gonna be used mostly for hunting so proly gonna go camo on the paint.


Is your plug getting wet? How is the compression? I had a huge problem with the fuel pump on mine. It would work great then stop.


ding ding ding, winner.
got it to fire up. rode it about 2 blocks and it died.

im not sure how to check compression. it sure did run good when it was goin,
i would barely touch the throttle and it would just about pop a wheelie.
but it did pull to the right while riding.

whats the best place to get some carb kits? or even parts for that matter?
the choke cable cant be pulled, it isnt attached to the handlebar.

this week at work during down time im gonna fab up a rear rack, the old handle
or whatever was back there stock was totally wasted.
and we will see what the tires do. as you can see 2 of them were flat, just
waiting to see how long they hold air.

[lookinforone]

also, what if the idle screw dosnt work?

and how can i tell what year it is?

[seanndenise]

the air filter looked good.
i wanna get it running and what not before i mess with the plastics.
but the paint is definately coming off. gotta cover the yellow up for sure.
its gonna be used mostly for hunting so proly gonna go camo on the paint.




ding ding ding, winner.
got it to fire up. rode it about 2 blocks and it died.

im not sure how to check compression. it sure did run good when it was goin,
i would barely touch the throttle and it would just about pop a wheelie.
but it did pull to the right while riding.

whats the best place to get some carb kits? or even parts for that matter?
the choke cable cant be pulled, it isnt attached to the handlebar.

this week at work during down time im gonna fab up a rear rack, the old handle
or whatever was back there stock was totally wasted.
and we will see what the tires do. as you can see 2 of them were flat, just
waiting to see how long they hold air.


dont fab it, buy this, 5 bucks. ive seen 10 of them on there in the last 3 months.
theres tons of stuff on ebay cheap for that tri moto. call your local dealer, they can get parts for it.

watch ebay .

http://cgi.ebay.com/ebaymotors/Yamaha-Tri-Moto-175-125-200-Rear-Grab-Bar-Bumper-Sissy_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1171Q7c66Q3 a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a0Q7c293 Q3a3Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZit em1c083e8850QQitemZ120397400144QQptZMotorsQ5fATVQ5 fPartsQ5fAccessories

[lookinforone]

thanks for the heads up, but with shipping it would be $20.
when i can make it at work, for free. and do it on the clock ;)

[Vealmonkey]

the 175 was only made in 82 or 83. I know the 83 sort of had a maroonish brown sticker saying 175, so if under that paint there are maroonish brown stickers, it's an 83. Any other color sticker, and it's an 83. If you have any of the choke cable still attached to the carb, you can pull the outside off and make a small loop in your cable and that should work for the time being. But you should look into either a proper choke cable or get a chock assembly off a 1977 ish mx175 carb where the choke pull is on the carb and not a cable. Make sure the vent on the fuel tank gas cap is unplugged. Those fuel pumps can be pricey, but they are still available. They are quite the wheelie machine when running right. Also if you can find one, there are rear suspension kits. I've found 4 over the years myself. Don't run anything but the stock exhaust on yours if you are going to use it for hunting, an aftermarket exhaust would not be very hunter friendly. Best of luck with your project.

[lookinforone]

the 175 was only made in 82 or 83. I know the 83 sort of had a maroonish brown sticker saying 175, so if under that paint there are maroonish brown stickers, it's an 83. Any other color sticker, and it's an 83. If you have any of the choke cable still attached to the carb, you can pull the outside off and make a small loop in your cable and that should work for the time being. But you should look into either a proper choke cable or get a chock assembly off a 1977 ish mx175 carb where the choke pull is on the carb and not a cable. Make sure the vent on the fuel tank gas cap is unplugged. Those fuel pumps can be pricey, but they are still available. They are quite the wheelie machine when running right. Also if you can find one, there are rear suspension kits. I've found 4 over the years myself. Don't run anything but the stock exhaust on yours if you are going to use it for hunting, an aftermarket exhaust would not be very hunter friendly. Best of luck with your project.


i seen somewhere that had a choke lever conversion. which is what i would like.
now that i think about it i bet i could use a mountain bike lever for a choke.
i mean the choke cable looked just like brake cable.
are there any service manuals on the net? i havnt been able to locate any searching.
yea the one thing i know about 2 strokes is that they are loud. lol.
and what are these "reeds" im reading about?

thanks for all the help. im stoked to get this thing goin.

[Vealmonkey]

I have a service manual for an 83. I need to make some xerox copies for an 80 yt125 service manual, so I'll try and get the 83 service manual copied too.
The reeds are behind your carb in the cylinder. The reeds open and close with the intake of the fuel from your carb. If the reeds don't close all the way, it will hurt the preformance of your bike.

[harryredtrike]

should be quite doable.that will be a fun trike when done

[MonroeMike]

You need a new lid for the ammo box too.

[lookinforone]

I have a service manual for an 83. I need to make some xerox copies for an 80 yt125 service manual, so I'll try and get the 83 service manual copied too.
The reeds are behind your carb in the cylinder. The reeds open and close with the intake of the fuel from your carb. If the reeds don't close all the way, it will hurt the preformance of your bike.

that would be awesome.
are there aftermarket reeds to enhance performance?


You need a new lid for the ammo box too.


no lid needed ;) found out from the PO that theres a 100lb weight in the bottom of the ammo can.

started making the grab handle today. made good progress, will get pics when its done.

[Vealmonkey]

I know boysen makes reeds, there may be others I don't know of.

[old-yellow]

Here check this link out.

http://www.3wheelerworldforums.com/showthread.php?t=86220

[lookinforone]

Here check this link.

http://www.3wheelerworldforums.com/showthread.php?t=86220

ive read that whole thread.
i like it, but dosnt answer any of my problems.


got the grab handle done, kinda. went to put it on and it didnt clear the muffler.
gonna have to take the torch to it and fix that.
but it still wont start.
i pull on the cable, and nothing. sounds like its not getting spark or fuel.

[old-yellow]

Try pull starting it or spraying starting fluid in the carburetor also have you pulled the spark plug and checked for spark or tried checking compression.

Alex

[Vealmonkey]

It sounds like it's not getting spark? You mean you haven't checked for spark and your on here looking for suggestions? You are going to make it tough on us here if you haven't even checked your trike for the basics. Check for spark first. Your next check would be for fuel. With the yt175, you should be able to detach the fuel line from the carb and pull on the recoil starter and see if you have fuel shooting out of the line coming from your fuel pump. Then it's wether or not you have fuel coming from your carb. If you have fuel and spark, then it's an incoming air issue. Either one of your intake tubes is clogged up, or your air filter is dirty. You really need to check all the basics. Are you premixing your fuel or are you relying on the premix oil pump? Have you made sure alll your premix oil lines are hooked up properly and that you have premix in the oil tank? Have you checked your compression? Are you holding the thumb throttle open while you are spraying in your starting fluid? Do you have you run switch switched to "ON" or does your run switch even work? Are you showing voltage coming from your stator when you pull on your recoil starter? These are all basic things that you should check. I'm sort of confused as you said it was getting spark and fuel before. That pretty much means that it should start or burp or pop or something. But in your other post, you posted that it doesn't sound like it's trying to spark? Either you have spark or you don't. You have to help us with better info so we can help you.

[lookinforone]

It sounds like it's not getting spark? You mean you haven't checked for spark and your on here looking for suggestions? You are going to make it tough on us here if you haven't even checked your trike for the basics. Check for spark first. Your next check would be for fuel. With the yt175, you should be able to detach the fuel line from the carb and pull on the recoil starter and see if you have fuel shooting out of the line coming from your fuel pump. Then it's wether or not you have fuel coming from your carb. If you have fuel and spark, then it's an incoming air issue. Either one of your intake tubes is clogged up, or your air filter is dirty. You really need to check all the basics. Are you premixing your fuel or are you relying on the premix oil pump? Have you made sure alll your premix oil lines are hooked up properly and that you have premix in the oil tank? Have you checked your compression? Are you holding the thumb throttle open while you are spraying in your starting fluid? Do you have you run switch switched to "ON" or does your run switch even work? Are you showing voltage coming from your stator when you pull on your recoil starter? These are all basic things that you should check. I'm sort of confused as you said it was getting spark and fuel before. That pretty much means that it should start or burp or pop or something. But in your other post, you posted that it doesn't sound like it's trying to spark? Either you have spark or you don't. You have to help us with better info so we can help you.


it was acting like it wasnt getting spark or fuel.

but i got it started today and it starts just about every pull.
im using the the premix tank.
how do i know if the premix pump is working?

anybody know where i can get a NOS choke assembly?

ive got some videos of it running but im hungry so ill upload them and post later.

[fabiodriven]

:shiftyeyes: Trailpros:shiftyeyes:

[lookinforone]

well lets see if this works

Click Here to watch (http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=58438114)


and another (http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=58438202)

they are on myspace.

whats considered a normal amount of smoke for 2 strokes?

and whats with the eyeballs?
ive seen them posted in a few other threads

[shadix518]

well the smoke is ok its not the worst ive seen and a buddy of mine has the same bike i believe his is the tri-moto 125...and the eyes is because you have trial pro tires on you trike but dont worry those tire will outlast that bike and they do get good grip i have them on both my trikes

[lookinforone]

how do i know if the premix pump is working?

went to a yamaha dealer, the choke cable is $33.
looks like ill be coming up with my own idea to make it work.

[shadix518]

honestly i would just premix so you dont run into a pump failing while out riding

[MonroeMike]

Sounds good. Those rear tires look new.

[lookinforone]

honestly i would just premix so you dont run into a pump failing while out riding

i dont wanna worry about pluging the oil lines and what not with the oil pump.

EDIT: how different is a YTM200? engine wise.
those are the only service manuals i can find online.

[shadix518]

ytm 200 is 4 stoke and yours is a 2 stroke completely different

and you could ither just lug the two lines or just leave it all hooked up same diff

[MonroeMike]

how different is a YTM200? engine wise.
those are the only service manuals i can find online.

Very, the 200 is a 4-stoke

[lookinforone]

well crap then lol.
i think ill just rely on the oil pump for now.
maybe down the road ill mix my own.

[lookinforone]

Look (http://www.haynes.com/products/sfID1/8/sfID2/80/sfID3/92/productID/366) what i found.
wonder if i should buy it.

[shadix518]

if you want the manual to your bike talk to vealmonkey i think he has the manual for your bike

[lookinforone]

yea he said he had one.
i dont wanna rush him. he said he had to get copies made of another one.

[shadix518]

well just ask him he may be making it to where he can put them on here for future yamaha riders like yourself i got lucky on the ytm200 its on here already

[MonroeMike]

There's one here too.

http://cgi.ebay.com/ebaymotors/HAYNES-REPAIR-MANUAL-YAMAHA-ATV-C-YFM-YT-YTM-YTZ-80-85_W0QQcmdZViewItemQQcategoryZ34240QQihZ015QQitemZ 250434154390QQrdZ1QQsspagenameZWDVW

[lookinforone]

wish that was cheaper Mike.
to bad id only save a buck pretty much.

[shadix518]

man your pertty close to me relatively speaking....kinda funny i used to live in yukon and i went to canadian valley tech center

[lookinforone]

yea 2 or so hours. where do u ride?

[shadix518]

there are some pretty cool places to ride here but i have really been wanting to go to little sarah but if you wanted you could totaly come up here and ride

[MonroeMike]

My library has access to this book, I just requested it. When it comes in I'll scan the YT175 pages first. I'm sure it's the condensed service manual, but it's better than nothing. Could be one day, could be a week.

http://www.themotorbookstore.com/atvman19vol1.html

[lookinforone]

awesome, ill have to check out my local library and see what i can find there.

[shadix518]

find where?

[MonroeMike]

awesome, ill have to check out my local library and see what i can find there.

Mine has online access. Yours might also, save you a trip.

[shadix518]

ha ha ha ha ha thats funny mike:lol: :lol:

[MonroeMike]

ha ha ha ha ha thats funny mike:lol: :lol:

You lost me there :wondering

[shadix518]

about how you have internet on your computer when he said he was going to go to the library to look up places here in kansas i was taking it as a joke but i see now it wasnt lol

[MonroeMike]

Gotcha.....

[lookinforone]

Mine has online access. Yours might also, save you a trip.


ill have to find out. cuz i dont even know where the damn library is.

EDIT: is there a way to change the amount of oil the pump puts in there?

[Dirtcrasher]

Hey bud, I'm not sure how exactly THAT particular pump works but:
]
Like the Yamaha Blaster; You start it and get it idling at XX RPMs' and count how many times the pump piston moves and or measuring the CC's of the oil it puts out and I believe it is very much adjustable. Of course when doing that check, you MUST run premix during testing. I personally don't like relying on pumps versus premix, but it is a real nice feature and does stand the test of time. I had a couple of Yamaha MX100's that were beat to hell and the premix was just fine!

The biggest thing is making sure everything is clean, tight and bled right up to the inlet to the motor before running it.

[lookinforone]

yea im actually lookin up how to bypass the oil pump right now.
due to everybody ive talked to sayin that its much better.

[shadix518]

wise choise lol :w00t: :D

[lookinforone]

anybody have a pic of the oil pump and what not so i can plug it all?

[shadix518]

well what you have to plug is one brass fitting on the right side of carb and another 2 on the crankcase on the right side of trike and also take the tank and such off

[MonroeMike]

anybody have a pic of the oil pump and what not so i can plug it all?

Do a search for YT175. Here's some threads.



http://www.3wheelerworldforums.com/showthread.php?t=88107

Edit, I just saw you read and posted there already...Anyway, there's more threads.

http://www.3wheelerworldforums.com/showthread.php?t=83762

[lookinforone]

awesome. ill be doin that tomorrow.
might start sanding my plastics down this weekend as well

[lookinforone]

that second one is pretty good.
havnt found that one yet.
ive searched "oil pump" and got some, but not a lot of returns.
right now the bikes at my dads, hopefully ill get it on a trailer and
get it over here so i can work on it whenever i want.
but tomorrow ill get to advanced auto parts and pick up some
vacuum plugs and get it setup for premix. i bought a 5 gal gas tank
and some premix oil today at walmarts. we should be on for tomorrow.

[lookinforone]

well today i found a perfect thing for a choke cable
http://www.supermotors.net/getfile/735888/fullsize/dsc_1759.jpg
got it mounted up
http://www.supermotors.net/getfile/735889/fullsize/dsc_1760.jpg
and got rid of the premix tank and what not.
http://www.supermotors.net/getfile/735890/fullsize/dsc_1764.jpg

the 3 ports in the pic are all that i need to plug, correct?

[lookinforone]

well, it looks like that cable isnt gonna work.
i dont have a way to attach the cable to the choke mechanism.
http://www.supermotors.net/getfile/735943/fullsize/060609182200.jpg
thats what the stock cable looks like.
the cable i have now dosnt have that thing on the end.

[MonroeMike]

I got the "ATV Service Manual Vol. 1 1974-1987" from the libray today, it has 10 pages on the YT125-175 (condensed service data). I'll scan it later tonight.

[lookinforone]

sweet deal.
i appreciate it Mike.

[MonroeMike]

I got it done, PM sent.

[lookinforone]

well i just won a new tire on EBay.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150349924450&viewitem=&sspagename=STRK%3AMEWAX%3AIT
hell of a deal i think. i think it even matches the rear tires on there now.

and yesterday i ordered the choke cable from yamaha. $35
the sooner it gets here the better. i wanna ride.

[MonroeMike]

Great deal on that tire.

[lookinforone]

yes sir.
i figured somebody woulda outbid me right before it ended sicne i was at work.

[lookinforone]

well i went to take the plug out and check it, and the coil wire came apart.
there are a few on ebay but was wondering if i could just rewire the boot on there?

[old-yellow]

Here pick one of these NGK plug ends up, they screw on the end of the plug wire this is what I used to fix mine. Sorry dennis kirk don't have a picture but if you have a dennis kirk catalog it's part number #20-50.

http://www.denniskirk.com/jsp/tpl/product.jsp?store=&catId=412&leafCatId=41206&skuId=2050&productId=p2050&mmyId=

[lookinforone]

the problem was that is just came unscrewed.
i didnt know that it screwed on there.
now i need to get the new front tire on there. and get her painted.