My 90 is a dog :(

[atc350xer]

Are they all like this? Is it a power to weight ratio thing? I just can't fathom someone racing something like this at one time
Seriously though, in high range, it takes like 10 seconds before I can shift into second... it runs fine, compression is good, starts on the first pull, but it has no power!

[shortline10]

I need to get some video up of one of my modified 90's and you will be very suprised the power they can make .

[motoman1012002]

yesh shortline we want vid's

[atc350xer]

I need to get some video up of one of my modified 90's and you will be very suprised the power they can make .

What do I start? It's fun, and reliable, but I'm sure it needs something adjusted... also shortline, there's a trail 90 at my local scrapyard... is it worth grabbing the engine for cases,tranny, etc?

[Vealmonkey]

The 90 engine only make around 9hp or so. So making sure it's in proper tune and the chains and clutch are properly adjusted and the wheel bearings are nice and free rolling is absolutely critical. But, you can change the tires and change the gearing somewhat and pick up some performance. Then you had cams and carbs and intake and some other bits and all you could do was add power. Some of the hottest 90 engines would run racing gas and alcohol. And believe me, the performance of a stroked and bored and tweaked atc90 is pretty fricking amazing if you have never ridden one. Way to fast for a single drum brake and no suspension.

[atctim]

Hey Matt - a couple of points to ponder:

My 110 is a dog in Hi range - I almost always run her in Lo. I think they are all like that. Louis Mielke has a super nice un-molested un restored survivor 110 (1985) and it runs the same as my 110 does. Hi range is for flat pavement or people under 125 pounds I have found.

Secondly - I ran a set of 18" tires on the rear of my red white and blue 110 and it feels way more powerful.

Lastly - I think you have 22" "Wooly Boogers" on the rear of yours - is that right? If so - those are a heavy tire to begin with. Just for giggles try swapping the entire hub (tires and everything) off that Chinese quad you have - I think it will most likely have the same hub - but it has tiny rear tires and then ride it for a few minutes. Let us know how it feels then.

Cheers - Tim

[200XMichigan]

Is the Trail 90 at the junk yard complete? I need some Trail 90 stuff and have a couple ATC 90 engines. The engines swap but the charging coil isn't needed in the CT90 engine.

[atc350xer]

Thanks Tim and Vealmonkey... I'll experiment... and 200xMichigan, the trail 90 looks complete, I can ask for a price if you like, but shipping would be expensive, obviously.

[200XMichigan]

You should pull it out of there. I got one a few days ago and they are a blast. Plus I feel a lot better letting people ride it than the 200X. No crashes yet.

[atc350xer]

Well, I put 70 rims and tires on the 90, direct bolt up to my 90 hubs... still a dog. I know it's an adjustment somewhere... I seem to have to re-set the points every day because it sounds out of time when I rev it (breaks up). Points are set correctly. Timing "seems" to be correct. Carb seems to be adjusted properly... what else will make it break up and have no power? I have never adjusted valves before could that be the issue? Is this hard to do? My 90 manual (the one from this site) is rather lacking... any advice?

EDIT: A better way to put it... it has no snap at all, even in neutral... punch the throttle and it takes 5 seconds to wind up to full RPM

[Mr_RPM]

well my stock 110 is not the fastest revver either in neutral, but with my 180pound body on it with 22 inch Carlisle strykers (sooo heavy) it still has plenty of snap in first to pop up on a wheelie. i can get to 40 MPH in 300-400 feet on a hard pack flat. i can get from a dead stop, threw 1st and into 2nd in like 2-4 seconds (in high). so id say something is wrong. i mean not sure on the power difference on an old points 90 Vs. 1984 110 but it cant be much. my piston is only 5 years old but it is oem. what im saying is my 110 is fresh still.
i almost never use Low range except for tight trails and pulling things, Low range is tractor/tank mode for my machine. riding on open trails is horrible in low, its just so slow.
i have also used 20 inch razrs and 21 inch dunlap tires (stock on blasters) and like the heavy 22 inch set up the most.
just my experience

[Vealmonkey]

Valves aren't hard to do. It does take a little getting use to the first time you do it. It seems like 3 hands would be nice, but you'll get the hang of it. If you rev the engine high, the points are set up with a flexible piece of spring steel. Older points will have more of a tendency to float as it seems like cheaper (non honda) points sometimes seem to lose their tension in the spring steel and it makes the ignition pop alot. But sometimes old intake gaskets will do the same thing if you are sucing in air somewhere. You can be dealing with 25 year old or more gaskets and points and condensers and such. Alot of times, newer tune up parts will do alot to help your trike run much better. But you have to make sure are you different systems are working in top notch form as you don't have alot of extra power to play with.

[atc350xer]

It is snapping and popping alot... it'll run fine, then start that snapping and popping, so I reset the timing, thinking it may have moved, but it has done it a few times, so it has to be something else. I can see from the new gaskets that the top end was apart recently(the guy told me it was rebuilt, but that can mean different things to different people I suppose), so gaskets shouldn't be an issue. The more I think about it, I used the carb that came with the trike... my other carb has a fresh rebuild on it, so I'll swap them and see if it helps. Thanks for the advice...

[Goggans]

when you one way gear went out did it make a noise when it was running or does it, because mine has a clanking noise

[Vealmonkey]

A cheap hop up was to bolt on a 110 carb and intake. You can usually find 110 carbs and intakes pretty cheap and then all you would likely need is a rebuild kit.