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by GG
Mon Aug 08, 2022 11:12 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: Lubrication
Replies: 7
Views: 24610

Re: Lubrication

Re: oil. The original specs was for 30w in the summer (20w in the winter). I've read that the needle bearings used on our cranks don't like too thick of oil. The oil will just be "pushed" along and won't lubricate. A good 30w detergent (if you can get it) is still a great oil. But since the 30w oils...
by GG
Fri Aug 05, 2022 8:29 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: How to replace cam chain roller?
Replies: 3
Views: 1875

Re: How to replace cam chain roller?

Hello,

I see some rollers listed on ebay and other sites for the cam chain tensioner. Just the roller. But looking at mine, I don't see how it comes apart in order to just change the roller.

Any advice on how to do this?

Thanks!

GG
by GG
Fri Aug 05, 2022 8:29 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: How to replace cam chain roller?
Replies: 3
Views: 1875

Re: How to replace cam chain roller?

Hello,

I see some rollers listed on ebay and other sites for the cam chain tensioner. Just the roller. But looking at mine, I don't see how it comes apart in order to just change the roller.

Any advice on how to do this?

Thanks!

GG
by GG
Thu Aug 04, 2022 3:02 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: What kind of crush washers for Superhawk head?
Replies: 0
Views: 130020

What kind of crush washers for Superhawk head?

Hello! I'm reassembling my Superhawk, and would like to know about the crush washers at the very top of the head. Some of them have to seal oil (all)? The originals appear to be aluminum. I can get copper washers. I always had a bit of leakage from some of these washers. I just don't know if copper ...
by GG
Sat Jul 16, 2022 7:23 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: How to replace cam chain roller?
Replies: 3
Views: 1875

How to replace cam chain roller?

Hello - I've searched the forum but can't find the info I need. I have a 1966 Superhawk and would like to change the cam chain roller (mine is very hard, brittle and notched). It has a little oil scoop on one side, and two tabs on the other. Is there an obvious what to get it apart that I'm missing?...
by GG
Fri Jul 15, 2022 6:10 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: CB77 Superhawk spits raw oil out of left muffler
Replies: 5
Views: 2983

Re: CB77 Superhawk spits raw oil out of left muffler

Update on Superhawk - it was the head gasket. An inside piece pretty much disintegrated, which explains why it was pressurizing the crankcase so much. There is a very small scratch in the cylinder where the piston sucked the piece of gasket in and it rubbed up and down for awhile. But honing will cl...
by GG
Thu Jul 14, 2022 3:25 pm
Forum: Motors - 247cc | 305cc | 337cc | 350cc
Topic: CB77 Superhawk spits raw oil out of left muffler
Replies: 5
Views: 2983

Re: CB77 Superhawk spits raw oil out of left muffler

Thanks Geoff - yes, these are basically my conclusions. I've pretty much ruled out a worn valve guide - this happened rather suddenly, and the bike has been maintained well. I guess the top end is coming off. (sigh)

Have a great day!

GG




 

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