An '81 Honda CR wth a Sachs engine - interesting combination.
Are you doing the engineering yourself? I would imagine the CS sprocket
allignment, engine mounting tabs etc. is quite a challenge.
I have been working on putting an HPP valve era CR250 (92-01) engine
into a gen 4 frame from an '08 CRF 250 for the ultimate CR250.
The latest generation frames have superior handling characteristics to
any of the aluminum frames offered when the CRs were in production.
The '08 CRF 250 has the same geometry as the '93 CR250 (best ever)
and is pounds lighter. The HPP valve engines were much stouter than
the lame RC case valve engines the last CR250s were equipped with
I am building the engine now using all the best parts ('01 cylinder, Keihin
PWK carb with TPS, V-force 3, dual map programmable ignition, billet
crank, coated superlight piston, works tranny gears, Hinson clutch, lots
of titanium and carbon fiber, etc., etc.)
Unfortunately, I have run into some problems with case width, CG, and
CS sprocket allignment. It is doable because Service Honda is turning
out quite a few CR500 AFs which is a similar concept.
I am motivated because I am tired of the overpriced, unreliable and oversized
four strokes that were forced on us by the idiots at the AMA because of a
loophole in the rules. The price of racing per season has tripled because of
bike, maintenance and parts cost. But, if you can't beat 'em, join 'em. The
new rules allow a 250 two stroke to compete heads up against the 250 four
strokes. That's a rule I like, so it's back to the "tiddler" class for me.
dogger
p.s. Anybody want to buy some CRF 450s? I have an assortment, new and used.
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