Hep with engine rebuild

rrietman · Post by **rrietman** » Thu Nov 17, 2011 9:52 pm

S; yes that method will work very well. the tools shown in that video will set you back about $800. how many heads do you want to rebuild to break even on the tool cost? If you can't get the valves to seal by simply lapping them, then you need the seats cut. valve guide wear is a whole nother matter involving several machining steps and then recutting the seats. try lapping, if they seal, just run it. otherwise it needs to go to a machinist.
Randy

Bernhard · Post by **Bernhard** » Fri Nov 18, 2011 8:20 am

davomoto wrote:Besides the cost of the tools, you really do need to know what you are doing. Valve seat height etc must be correct.

Davo

Honda can supply their dealers with an expensive valve seat grinding kit. –yes I have used one, but you need to know what you are doing.
There are vale seat cutter kits available, mainly for the tin box, car boys & gals, but they are unlikely to have the right size spigot for the bike valve guide, you would have to get one made up.
Depends if you can justify spending all that money on tools you will rarely use, or find a local bike dealer or engine restorer/reconditioner who has the right tools.

skisurf · Post by **skisurf** » Fri Nov 18, 2011 12:37 pm

I'm contemplating buying the tools. I have 3 others Honda CBs in my garage that need to be rebuilt and I'm enjoying this so much I plan to keep this hobby. Question is how many will actually need the seats cut, does it justify the expensive tools.

What does a shop normally charge for seat cutting?

davomoto · Post by **davomoto** » Fri Nov 18, 2011 12:59 pm

Probably all of them. I pay $125 to have the valves and seats cut, and the head milled. Cost depends on your area etc. I know that LM does them for a very reasonable price! have you checked out Neway? They have cutters for seats and valves. Google Neway.

Davo

skisurf · Post by **skisurf** » Fri Nov 18, 2011 8:33 pm

Good news, bad news. I finally rode the bike today, we'll get to that in a second.

Good news: tested compression again after riding it.

Right: 120
Left: 130

Believe the manual says 120?

Bad news: The bike runs awful. Gotta be the carbs. I cleaned them really good and think they're tuned right (needle jet 2nd clip, air screw 1 1/4, etc) but just can't get it running properly. Going to take them apart and go through everything again.

Jethro · Post by **Jethro** » Fri Nov 18, 2011 10:41 pm

Do Ed's tune up recipe. Follow it closely and you will be happy. I think it's on the homepage.

LOUD MOUSE · Post by **LOUD MOUSE** » Sat Nov 19, 2011 3:06 am

It's in the FAQ section of the yellow band. ..........lm

Jethro wrote:Do Ed's tune up recipe. Follow it closely and you will be happy. I think it's on the homepage.