1969Honda
Been Around the Block
So I'm having problems with a camshaft that I purchased a few years back for my '69 cb350 twin. I had to rebuild a small engine for a college course and decided my misfiring, oil blowing 16th birthday present would be a great candidate. While going thru the rebuild and correcting the shattered piston rings and re-boring the cylinders I decided to go with a .75mm overbore and found a hopped up cam to go with it on flea-bay. The gentleman I bought it from informed that all he could remember is that it was a hot cam he had bought in the early 70's for a cb350 twin chopper project that never got completed. The cam looked (and still does) to be in great shape with no wear visible on the lobes, so I paid $25 with shipping and then tried to install it with no avail. To pass the class I ended up stuffing the original camshaft in to get the motor running for my final grade.
Fast forward a decade and now I'm tearing into the engine to re-install the kick starter shaft retaining spring and see if I can swap the cams in the process. I've attached some pictures of the original and the "new" cam side by side for reference. It looks like on the first lobe of the points end of the cam it has a 104 stamped into the side of the lobe. My big problem with this cam is that it seems to have so much lift that it's causing the valves to bind up and I can't rotate the engine over, I reinstalled it last night to verify this problem again and somehow broke one of the rubber inserts at the base of the cam chain tensioner.
If anyone can shed some light on what I could do to correct this problem I'd appreciate it. I'm mainly looking to use the bike as a "hot" street bike to run back and forth on errands and pleasure trips thru the canyons of Utah.
The cam at the top of the first pic is the original, as well as the left in the second pic.
Fast forward a decade and now I'm tearing into the engine to re-install the kick starter shaft retaining spring and see if I can swap the cams in the process. I've attached some pictures of the original and the "new" cam side by side for reference. It looks like on the first lobe of the points end of the cam it has a 104 stamped into the side of the lobe. My big problem with this cam is that it seems to have so much lift that it's causing the valves to bind up and I can't rotate the engine over, I reinstalled it last night to verify this problem again and somehow broke one of the rubber inserts at the base of the cam chain tensioner.
If anyone can shed some light on what I could do to correct this problem I'd appreciate it. I'm mainly looking to use the bike as a "hot" street bike to run back and forth on errands and pleasure trips thru the canyons of Utah.
The cam at the top of the first pic is the original, as well as the left in the second pic.