Big bore question

GORDON BROWN · Post by **GORDON BROWN** » Tue Sep 12, 2017 6:15 pm

Hello Everyone

With CB350 pistons you also have to change the valve pockets as they are a different angle / position ( not sure if you need this with a std. road cam? ) and shorten the skirt as the stroke is longer on the 72/77.
For racing they ( and the head ) need quite a bit of work to get enough compression, though people including Yoshimura have used them.
Charles, I should have a pair of useable ASSO pistons if you need them for the racing.

Gordon
SAFOJ

moondoggers · Post by **moondoggers** » Sat Sep 23, 2017 5:48 pm

I have the Bore-Tech 358 kit and valve spring kit from http://www.rdvalvespring.com/spring-kits.html Gobs of torque and compression in my 66' 305 Scrambler. A whole different feel with this set up.

Nick · Post by **Nick** » Mon Sep 25, 2017 5:42 pm

Jawa 350 Californian!! The only motorcycle with the Kickstarter, shift lever and clutch all operated by the same pedal!

(Our shop had a sidecar-equipped model - too much fun!)

moondoggers · Post by **moondoggers** » Tue Sep 26, 2017 8:42 am

The Jawa is especially rewarding to ride on the back roads in my local, a solid dependable machine. I exercise all 3 bikes weekly with 40 mile round trips.

oldbikedude · Post by **oldbikedude** » Tue Sep 26, 2017 8:32 pm

Nice collection.

supervision · Post by **supervision** » Wed Sep 27, 2017 8:43 am

nice bikes, your location has some turns, south of Prescott..