Vintage Dirt Bike Q & A

I saw on the swap meet board that someone asked about the 290 kits for 78-80 CR 250's? I was wondering if anyone here knew anything about these?

I hope the kits are for the Age Classes where all bikes run against eachother. Big bore kits are great for the modern Vet classes so they should work great for Evo racing too.

It would be a real sad statement if folks wanted to cheat within their dispalcement classes. I hope it never comes to that.

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#829 The "Factory Novice"

1988 Honda CR250RJ
1983 Honda CR480
1981 Can-Am 250 MX6-B
1979 Honda CR250RZ
1979 Kawasaki KX250 A5
1978 Husky 250CR
1978 Honda CR250R
1977 Yamaha YZ400D
1977 Suzuki RM125B

i just use my bike to rip around the countryside with my buddies who have old yamahas (mines fastest haha). i would be interested in a 290 kit do you have a URL or anything?

Thanks

This kit is available from Kustom Kraft. I raced with one in the ACR evo open class. The bike was easier to ride with a little more low end. A little better on holeshots also. After two laps it seemed to heat up and start detonating. I finally blew it up at Southwick, MA while leading. My recomendation would be use two base gaskets to raise the exhaust port and use 100 octane fuel with say 927 Maxima Oil at 40:1. #185 main jet. I am considering putting another one together for this season. Oh yeah, maybe balancing the crank would also help.

Dan