ATC 200s MODS! NEED MORE IDEAS!

[twotimetommy]

I currently run an 81 ATC 200s with a 67mm piston 12:1(110 octane race fuel), WEB racing Cam, port and polish, bigger carb. The trike was stripped down to nothing and painted the frame and mounted a LTR 450 rear fender on it and seat. The gas tank was replaced with one from a xr70 and has the fender flares on it as well. i custom fabbed a 400ex sprocket mount so i can change them out when nessecery.
I am looking for more engine mods but the cylinder and head have to stay original to the frame. cant swap with a 200x or anything. possibly a stroker kit if its still made or anything. i'll post pictures when its done and painted. please HELP me out with ideas Thanks! I ice race it in wisconsin

[shortline10]

Lighten the flywheel and use a 28mm mikuni . Web cams never impressed me with the power they make . You want a decent cam get a megacycle 435 lift 288 duration and hold on !!!! .

[twotimetommy]

I can't find the megacycle cam for a 81 200s. Only the 200x. Does that still work?

[fabiodriven]

I can't find the megacycle cam for a 81 200s. Only the 200x. Does that still work?

I believe the XR cam will work, but wait for a reply from someone who knows for sure.

What I wanted to say was-

[shortline10]

Yes it will work fine in a 200s head but I dont believe you can use the compression release anymore .

I can't find the megacycle cam for a 81 200s. Only the 200x. Does that still work?

[lndy650]

hey not sure why my pm isnt working email me at indy650@live.com and ill get some info on what you want/ what type of racing your doing ect.. and get you some estimates
-john

[lndy650]

i weld and grind my own cams but you can use a 200x cam they are the same thing up to 1985. the 86/87 had roller bearings

[dexterr]

These are my mods all stock with jets,exaust new head, and as for a more sporty look I got aluminum rims all around with lightweight tires and I had a custom made grab bar but I got a stock one also I got. A tool box from Craiglist