fastest cheap motor build?

[250rPRIDE]

hey everyone, new to the forum, cant wait for all your helpful info and tips, theres some sweet bikes on here, im just getting back into my 250r's. i have had a few years ago and just bought 2 complete bike and 1 in boxes all within the last 6 months, sold most of the parts bike and got another almost done and when i sell it i want to do up my 88, but i am interested in the fastest motor you can build without spending a ton of money and without going huge on displacement, my past 88 was ported by a private guy that knows his stuff he builds motors for pro riders, but with his porting a 39 carb, k&n, rad valve, and pt hi-rev at about 190lbs . i run a 7.8 at 67 mph in 500' in full trail trim. the best my buddy could do on a ct 330 was a 8.1 but it was torqey *** hell,we are racing in dirt not sand i live in pa and sand is hard to find. but anyways i like speed top end im only 165lbs so i like a fast hi-reving motor, what should i do stick with a 250 or go to a 265 with the spacer plate or295 310 350 400stroker HA???????? help. i really dont want to get my cases cut either, i liked beating banchee's and 450s with the stock 250 cc bore if you know what i mean. but i am open to anything, lets here some of your ideas and what worked for you, so i can go out run the lt250r that has been winning it all for years, when its not broke down. also i thought i should let you know i do trail ride my bike a little so i am not building a deticated drag machine, thanks a lot

[racerx573]

I ran a 265 Powervalve, and I blew the doors off of most of 4-strokes on the straights.. You can find all kinds of cylinder deals on ebay and on these forums..

I would go with a 275 PV, or a 310 PV from ESR, but have someone else do the port work.


My buddy had a 275 PV done by Duncan, and it flat out walked away from the 265 PV with with just the added 10cc


I had a TC 265 non-PV, GT Thunder 265 non PV, Duncan 275 Hyperdyne non-PV, CT 265 PV, and a CT330.

The 330 was a monster and was awesome on open tracks.

The 265 PV was my favorite, then the 275.

Here's a few to look into...

http://cgi.ebay.com/ebaymotors/250R-TRX250R-Honda-TC-National-Cylinder-89-Head_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em14QQh ashZitem5634549130QQitemZ370245144880QQptZMotorsQ5 fATVQ5fPartsQ5fAccessories

http://cgi.ebay.com/ebaymotors/Honda-TRX-250r-310-Big-Bore-Kit-Cylinder-Polished_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em1 4QQhashZitem3a520b3d04QQitemZ250484571396QQptZMoto rsQ5fATVQ5fPartsQ5fAccessories


Whatever setup you go with, definitely go with an OEM '89 crank with an '86 style (Wiseco) piston/spacer plate set up, Hinson basket at minimum.

V-force reeds always worked well for me with a 1/4" spacer, and a 38mm Airstryker carb or 39mm PWK

Sparks MX or TT pipe (depending on what motor, I ran a TT pipe on my bigger engines/PV motor)

I heard Neil from C-Leigh Racing does some pretty sick port work.

Good luck, let us know what you decide to go with.

[racerx573]

BTW that was from an MX point of view.

[250rPRIDE]

Jason, do you have any of your motors for sale or does anyone you know? do you have to get your center cases machined for the 275 from esr?

where all do you ride or do you just race, i live about 30 mins from j-town. let me know what you got if anything i got a lot of friends with r's too.
thanks
Pete

[fulltiltrider]

30 min from johnstown huh. Im from southfork, if you want to see what a 310pv from c-leigh runs like.