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View Full Version : ATC 200s MODS! NEED MORE IDEAS!



twotimetommy
01-09-2012, 06:39 PM
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!:idea: I ice race it in wisconsin

shortline10
01-09-2012, 07:15 PM
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
01-09-2012, 09:27 PM
I can't find the megacycle cam for a 81 200s. Only the 200x. Does that still work?

fabiodriven
01-09-2012, 11:05 PM
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-:pics::pics::pics:

shortline10
01-09-2012, 11:35 PM
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
03-23-2012, 12:09 PM
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
03-23-2012, 12:12 PM
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
05-03-2012, 10:19 AM
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


http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0248-2.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0217-1.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0182-1.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0186-1.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0219-2.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0721.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/IMAG0742-1.jpg
http://i740.photobucket.com/albums/xx49/whittingtondexter/9f3d40f6.jpg