Buying a pit bike motor for a 70...

[atc350xer]

You cheatin' 70 guys... please chime in... what do you think of this motor and this deal? I'd rather have a semi-auto, but this deal seems way too good to pass up. Only thing it needs is an exhaust. Is the fact that it doesn't use an oil cooler a bad thing?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=320640503508&viewitem=&sspagename=STRK%3AMEWAX%3AIT

Also, what do you think of this exhaust?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=330516153267&viewitem=&sspagename=STRK%3AMEWAX%3AIT

[oneroom42]

i was thinking about getting one of them but i went with the 155z pitster pro. i still think i may end up with the lifan 125 in one of my 70s. alot of guys use them and love them but im sure they could tell you better.

[CRAZY70MAN]

You cheatin' 70 guys... please chime in... what do you think of this motor and this deal? I'd rather have a semi-auto, but this deal seems way too good to pass up. Only thing it needs is an exhaust. Is the fact that it doesn't use an oil cooler a bad thing?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=320640503508&viewitem=&sspagename=STRK%3AMEWAX%3AIT

Also, what do you think of this exhaust?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=330516153267&viewitem=&sspagename=STRK%3AMEWAX%3AIT

Never ran a Lifan, but that price looks pretty nice with all the goodies!! I guess it depends what you are doing with it. The pipe.......the cheaters always preached cobra only to me for the combo's I and some of them run....they seem to be a match made in cheater heaven... lol That is a nice price for another option though?? Oil coolers not necessary but will help if you are beatin' them lap after lap in the heat. I am sure you would be very happy with that deal and the power it would make. Good luck, you could get a 140 piranha for that price maybe slighly more though if you keep your eyes open..........several of them run the 140 piranha. Good luck

[atc350xer]

Thanks for the response crazy70man... to the best of your knowledge, is there anything missing from the kit that I'll need? I noticed some motors are missing covers and such... I hate surprises!

EDIT.. Look at this! I guess I would need the clutch parts for this one...
http://cgi.ebay.com/ebaymotors/Piranha-140cc-Pit-Bike-Engine-crf50-atc70-crf-50-70-atc-_W0QQcmdZViewItemQQhashZitem5ade49a7f8QQitemZ39027 6425720QQptZMotorcyclesQ5fPartsQ5fAccessories

[Race Demon]

Looks, like it's all there to me, price is right, pipe is one I have never tried, I question the reducer going into the silencer, I like the bend that would tuck it in tighter to the frame about where the stinger goes on, I think it would take less to get a good fit than the cheap straight pit bike pipes I have used, oil coolers are a good idea if your going to twist the crap out of it , helps the rings last, most don't use coolers, 125cc motors make good power and start pretty easy, 140cc and up can be a butt to get started, I think the pirahna 140 is $350 plus shipping and their 125 is about $330 plus shipping, saving around 100 bucks would make me think twice and I have several 70s with all kinds of different combos on them

[Tri-ZNate]

another option is here http://cgi.ebay.com/ebaymotors/GPX-140cc-Pit-Bike-Engine-Pitster-Pro-CRF-ATC-50-70-/260717506181?pt=Motorcycles_Parts_Accessories&hash=item3cb3f96e85

Everything but the levers and throttle

[KASEY]

the lifan pictured is not a start in any gear motor. the pirahana is ,, i have one of the only start in netrual motors.. pain in the butt!! it will not kick over with the clutch pulled in...

[atc350xer]

I went ahead and got the 125 manual... I have a pretty cool idea for it to be revealed at a later date :naughty:

[Race Demon]

the lifan pictured is not a start in any gear motor. the pirahana is ,, i have one of the only start in netrual motors.. pain in the butt!! it will not kick over with the clutch pulled in...

Good point, I bump start all mine that are not electric start so I don't pay any attention to that :idea:

[Xpress]

Yeah, chinese motors are a pain in the butt. Always gotta find neutral with them to start them...

[KASEY]

Yeah, chinese motors are a pain in the butt. Always gotta find neutral with them to start them...

chinese motors are great,,,, only a few of them, the cheaper ones that have the clutch mounted on the crank not the primary shaft are a pain,,, NOT ALL CHINESE MOTORS!!!

[Race Demon]

chinese motors are great,,,, only a few of them, the cheaper ones that have the clutch mounted on the crank not the primary shaft are a pain,,, NOT ALL CHINESE MOTORS!!! I could not agree with you more, been there blown that , for the money you spend and the power and duability you get, the chinese motors are great, my 70s get abused and for the most part they take a beating and come back for more, yes the Honda stuff has better quality but factor in the price, and the fact that alot of the parts you use to make the Honda run are [aftermarket], I just start with a bigger chinese motor and save some cash for the next project

[Xpress]

chinese motors are great,,,, only a few of them, the cheaper ones that have the clutch mounted on the crank not the primary shaft are a pain,,, NOT ALL CHINESE MOTORS!!!

Well yeah, I mean most of them will run through hell and high water too. Just the starting that is a pain, sometimes.. (and with some motors) :Bounce

[bcredneck]

thouse lifan 125 motors are great i borowed a pitbike with one for a weekend if you put a crf 100 carb on them you wont have to open the carb up all the time the originals suck and the jets viberate lose and fall into the float bowl at the worst posible time but on some the fly wheels arent balanced properly and they shake like crack addict on top end

[shortbus]

What do you do for the kick starter on those motors? wont it hit the fender?

[Vealmonkey]

Most people put a pull start conversion on them and don't use the kick starters. You won't believe how many people get the electric start engines and go push button though. You have to mount the battery inside the frame above the skid plate. It's tight, but it works.

[atc350xer]

I want to use the kick starter and plan to do flip fender, if I can find some good pics of how the pieces are fabbed.

[shortbus]

Welp i just ordered a lifan big bore 138cc oil cooled, start in any gear motor. Cant wait till this bad boy comes, any idea on what exhaust system to run? cobra pipe?

[bcredneck]

if you get a 100/125cc motor a crf 100 carb works good most china carbs arnt made that well ive only worcked on 3 two of them the main jet rattled out and was in the floatbowl the other had werid gel crap in it and it was brand new off the internet

[oscarmayer]

my friend steve here near me makes a living repairing the smallchinese bikes. he has tons of motors. He coudl give you a better deal on a motor if you wanted.
his info:
Steve Pollard
pollards72@yahoo.com
817.793.2886


he can give you a fill package deal with harness, and everything.

[shortbus]

my friend steve here near me makes a living repairing the smallchinese bikes. he has tons of motors. He coudl give you a better deal on a motor if you wanted.
his info:
Steve Pollard
pollards72@yahoo.com
817.793.2886


he can give you a fill package deal with harness, and everything.

Darn wish i just didnt order my 138! :( Whats every one running for exhaust and sprokets on these so i can order them.

[ditchmud]

I want to do one with electric start. I think I found a good motor but it's out of stock right now and I haven"t been able to find the same motor anywhere else.:wondering
http://www.dratv.com/co12auelboat.html

[shortbus]

Damn out of stock until april! Harsh!

[Race Demon]

I use Cobra pipes on mine, its a pretty easy mod to make a pit bike pipe work if you want a high pipe thats shinny, Wholesale-cycle and TBolt also have plenty of motors to choose from at good prices, nothing wrong with Dr atv I get a lot of stuff from them to

[Mosh]

You can just cut the rear fenders, and make some rear hub spacers and use the kicker.
The pitbike pipes work fine, but I like the idea of the Cobra under pipe but I am not sure if the kicker will clear the Cobra under pipe..
EDIT on the pitbike pipes. You will have to cut and tweak them and reweld them to make them work, but it is not that big of a deal if you have a welder.

FYI..For those of you that know him in or around Ohio..Flyin Brian makes pull start kits for a fraction of the price anyone else does.

Last I heard, you supply your old 70 cover and he does the mod for like 75$.

[ditchmud]

Thanks Mosh for the info. I might have to go that route.

[atc350xer]

I had to buy an intake adapter for the Lifan to get my carb to clear everything. Now, the adapter (which is held on the motor with 2 phillips screws) keeps coming loose and allowing air into the motor. I tried high heat loctite but it still loosened up. I did not let it cure, however... should I have? Should I go buy some red loctite?

[Mosh]

If you use red lock tight it may not come back out without pulling the threads.

Whats the deal? Not enough clearence for the 8mm bolts from the factory?

[max]

[QUOTE=Mosh;967924]You can just cut the rear fenders, and make some rear hub spacers and use the kicker.
EDIT on the pitbike pipes. You will have to cut and tweak them and reweld them to make them work, but it is not that big of a deal if you have a welder.

FYI. on my pit bike pipe i didnt have to make any cuts. I just heated it up and bent the pipe to get proper angle. Probably all depends on the pipe and what it came off of.!!

[86trizinger]

On the carb adapter, or at least the one I have the bolts need to mount fluch with the top of the plate in order for the manifold to rotate in the position you need.

On my carb adapter I bought very quality flush mount allen head bolts.. They work great and haven't backed out yet

[200XMichigan]

Red loctite releases with heat, so if you use it you would have to hit it with a torch before removing the screws. Would it be possible to just use bolts instead of screws, get a little more torque on them.

[shortbus]

Damn so i guess iam going to have to get some type of adapter so my carb and everything will fit?

[atc350xer]

Whats the deal? Not enough clearence for the 8mm bolts from the factory?

I had to rotate the carb 90 degrees... the air cleaner hit the forks when rotated front, and hit the backbone when rotated back. Mine sticks out the right side.

[shortbus]

Anyone have pictures of how they did there setup?

[Mosh]

We use the intake that comes with the kit.(at least on the pirahna engines.)
Then we just dent the back side of the tank so the carb cap and choke lever clear, and mount the carb in the normal posistion.

If that idea don't sound good to you, then you can cut and shorten the intake and reweld it, or buy a low pro intake from sterdy.

EDIT your carb sits out the right side? I just read that.. In that case, I have no experience with dealing with that.

[CRAZY70MAN]

We use the intake that comes with the kit.(at least on the pirahna engines.)
Then we just dent the back side of the tank so the carb cap and choke lever clear, and mount the carb in the normal posistion.

If that idea don't sound good to you, then you can cut and shorten the intake and reweld it, or buy a low pro intake from sterdy.

EDIT your carb sits out the right side? I just read that.. In that case, I have no experience with dealing with that.
Right side??? Never ran a carb on that side. My 150 was setup using the "Rubber Mallet" on the tank bottom as Mosh stated...tight but works fine. Is on the left side though sitting on bike. I also had to shim the rear of the tank where it bolts to frame with a few washers for extra clearance.....good luck.

[shortbus]

I guess i will see how everything fits when my lifan gets here, if not IT GETS THE MALLET!

[Tri-ZNate]

Right side??? Never ran a carb on that side. My 150 was setup using the "Rubber Mallet" on the tank bottom as Mosh stated...tight but works fine. .

+2 - rubber mallets. It should go left side and I know the carb/tank clears with a fiberglass tank. Only issue is choke is too high but its not a big deal to me

[atc350xer]

Right side??? Never ran a carb on that side. My 150 was setup using the "Rubber Mallet" on the tank bottom as Mosh stated...tight but works fine. Is on the left side though sitting on bike. I also had to shim the rear of the tank where it bolts to frame with a few washers for extra clearance.....good luck.

Yeah, right side... I may have to find a way to swing it to the left after burning myself on the header while turning the choke off :lol:
I have a really nice tank, so I didn't want to dent it, and I also shimmed the rear of it up to clear where the carb and intake join together.
My throttle cable now lies right alongside the right side of the tank, I think it was in the way when I tried it on the left... I don't have the 90 degree boot, maybe that's my problem.

[Tri-ZNate]

Can you rotate the intake 180* to turn the angle the other way?

[atc350xer]

Can you rotate the intake 180* to turn the angle the other way?

That's what I was saying... maybe if I had the 90 degree carb-top boot... otherwise, the top of the carb/throttle cable is in the way of the tank bottom

[Tri-ZNate]

That's what I was saying...

I didnt mean to reiterate but obviously if you flip it the one way it'll go to the right side. Just wanted to make sure all the simple things were covered before you go dumping cash. If you need a pic or anything I posted a pic in the other 70 thread

[atc350xer]

Thanks Nate. I flipped it 180 degrees... for some reason, it fit this time :lol:
I was also able to get rid the the rubber spacer under the tank, so my seat/fender should fit better. Only small issue is that the choke hits the tank a little when on full. No biggie. Also, this thing idles weird... every now and then it revs up a bit all by itself. I thought air intrusion, but everything's tight.:wondering
Now I have to cut my brand new exhaust pipe and rotate and re-weld it so my fender can go back on :( Dang pit bikes use this upswept pipe... will not work as is...

[Tri-ZNate]

Thanks Nate. I flipped it 180 degrees... for some reason, it fit this time :lol:
I was also able to get rid the the rubber spacer under the tank, so my seat/fender should fit better. Only small issue is that the choke hits the tank a little when on full. No biggie. Also, this thing idles weird... every now and then it revs up a bit all by itself. I thought air intrusion, but everything's tight.:wondering
Now I have to cut my brand new exhaust pipe and rotate and re-weld it so my fender can go back on :( Dang pit bikes use this upswept pipe... will not work as is...

Great to hear. Yeah my choke hits as well and I ended up buying a crf50 pipe and doing a slight bend to it. The idle, probably the chinese carb. Mine does it as well. Have fun

[shortbus]

Great to hear. Yeah my choke hits as well and I ended up buying a crf50 pipe and doing a slight bend to it. The idle, probably the chinese carb. Mine does it as well. Have fun

Also another thing iam doing to have to do, bend the pipe! AHH its never ending!