Need the ATC110 Gurus for this one.

[BeerMan87]

I will get right to the point with this. I have tried searching around and threads about the 110 and engine mods but they seem to be pretty scattered about and trail off into useless information for the most part.

As of right now I have an 83 110 in good shape. I have the top end off and I was planning to bore it out. From research I have read that 56mm is the max bore of the 110 cylinder which puts it at 125cc's. I was heading that route until I stumbled onto another thread where there is talk of using a CB200 piston that is close in size to the original piston but increases compression for better results over just boring it out with the same compression.

What I am curious about is weather it is just a straight up replacement or if there is anything else that needs to happen for it to be compatible. Then a wild thought crossed my mind about having the cylinder bored to the 56mm and then using the CB200 piston .5mm over for a 56mm piston. Compression boost while being bored? I have no idea and I am looking for advice on this matter as I only know from what I have researched so far. Heres some pics and a link to a video of it running with the dg pipe. Im just trying to get more out of it for some fun. I know I could buy a bigger trike but this one has a special place in my heart. Iv riden it in my younger years quite a lot and now its actually mine. .

http://youtu.be/vVHDZ5AtUSY





Thanks, Steve

[Vealmonkey]

My question is why would you want to start messing up a perfectly good trike? If you really like this trike, then just fix it up and enjoy it. If you want to go faster, than get a faster model of trike. I can't tell you if a cb200 piston would fit or not. You would have to like at what wristpin fits the cb200 piston and what fits your 110. Then, you would need to figure out your piston deck height and how far to the center of the 200 wristpin and see wether or not how they compare to the 110 piston distances. Alot of people on here say alot of things, and then others on here actually do what they say. If you bore you cylinder out for the bigger piston, then you pretty much have ruined the cylinder as it's on its' last bore and can't be reused unless you resleeve the cylinder. The extra cc's in my mind aren't worth trashing a cylinder over. Unless you do alot of other work, the performance gain won't be very much. Unless this is something that you just really have to do. In that case, have fun and I wish you all the best. Alot of us have found out the hard way what works and what doesn't. Buy yourself a cb200 piston and find out and let us know. I try to stick with proven (and costly!) methods that work. Most performance parts were made for 90s, not 110. There's not really big differences, but there are differneces. Do alot more research. Buy the 200 piston, compare the pistons side by side and see what you come up with and go from there. Best of luck.

[swifty]

like veal said just bore it to the next size i have two 125cc big bore in some of my machines and honestly the one with a .25 stock over size style piston is the most powerful both big bore engines are smokers till warm the cylinders are super thin at that bore

[Stonewall]

I am just going to buy a new Lifan 150 engine from DrATV that will bolt right up in a 110 for mine. Or there is also an electric start Lifan 120 (I'm going to put one of these in my 90). I put a 70 Lifan in my ATC 70 and adapted the left cover plate and pullstart, and so far it's a great engine. Just a thought...

http://www.dratv.com/newengines.html

[Vealmonkey]

Stonewall, no lifan engine will bolt right into a 110 or an atc 90 for that matter. The lifan engines are based on the 50/70 cc engines which are dimensionally smaller than a 90/110 engine. You will need another piece for the engine to fit right in. Sorry about the bad news.

[Xpress]

I still don't see the point in adding all of this crazy power into a humble 110, especially with the stock pressed frame. Those aren't exactly strong...

With an aftermarket frame, it's a different story. I'd be all over fitting in a 200 engine

[BeerMan87]

My question is why would you want to start messing up a perfectly good trike? If you really like this trike, then just fix it up and enjoy it. If you want to go faster, than get a faster model of trike.

I have just been exploring options. I know its a 110 and I wouldn't be doing this for a go fast factor. It needs new piston rings and the price of those cost almost as much as a bigger piston and that's when I start doing some research. I would just do it because I can. I do a lot of trail riding and that's what I prefer. I would like to go the higher compression route but I do know there are hardly any types of those pistons around anymore and that's where I stumbled upon mention of the CB200 piston.

I do know im not going to be buying another engine, thank you for the suggestion though. I just really want to toy with it a bit. Nothing extreme. If there is/are high compression pistons out there for the stock bore by all means point me in the right direction I was just willing to spend the extra money to get the cylinder bored out when the rings cost as much as an OS piston.

[Vealmonkey]

Well, your engine may need more than just replacing the rings. If you have checked your cylinder and it is perfectly round from top to bottom, then just rings would work. But if your cylinder is worn unevenly, and most are, you need to bore to the next biggest size up and you would need new rings and piston. But to just bore your cylinder out to it's final bore, which would be like skipping 6 or 8 overbores, well, that's alot of riding time. And depending on how well the job is done and several other factors, is a big chance to take as it could ruin your cylinder. And without changine cams or bigger jets or a bigger carb and some other possible changes, it just won't really do you any good. But it is your trike. Best of luck. You said you wanted advice from 110 people, that's my advice.

[BeerMan87]

Well, your engine may need more than just replacing the rings. If you have checked your cylinder and it is perfectly round from top to bottom, then just rings would work. But if your cylinder is worn unevenly, and most are, you need to bore to the next biggest size up and you would need new rings and piston. But to just bore your cylinder out to it's final bore, which would be like skipping 6 or 8 overbores, well, that's alot of riding time. And depending on how well the job is done and several other factors, is a big chance to take as it could ruin your cylinder. And without changing cams or bigger jets or a bigger carb and some other possible changes, it just won't really do you any good. But it is your trike. Best of luck. You said you wanted advice from 110 people, that's my advice.

Yea going the max bore and then the cylinder be trash doesn't sound like a great idea haha. Maybe ill just order the cam off of dratv and new rings and call it a day. Even though I am still curious about the CB200 piston there just not cheap enough to buy one and try to get lucky when I can buy the cam and rings instead. The local shop around here wants 72 bucks to bore out my cylinder which I think is crazy but they have it and I want it (or wanted it). Might slap her back together and call it a day though. Thanks for the insight Veal.

If anyone else still has information on the CB200 piston or other options as far as higher compression feel free to jump in. Till then....

thanks, Steve