Project Sabre Cafe Part 22

Well here it is September 30th and I still don’t have the bike finished and on the road. I chased out another “Gremlin” though in the form of another faulty CDI box. It was the one with the rev limiter and it’s been replaced with a unit without a rev limiter. It revs to 6K now but no higher. I’m going to re-tune the carbs next. I really have no idea what work might have been done on them in an effort to fix the problems this bike had when it was first brought to the shop I bought it from. That’s for next week’s video.

Keep on hackin…

Project Sabre Cafe Part 21

In this video I pretty much rule out the carbs as an issue and I also do a valve adjustment. I replaced the CDI ignition unit that controls the spark to the front two cylinders however that pesky Gremlin is still there! At 5,500 RPM the revs just fall off on the front two cylinders. More troubleshooting required.

Keep on hackin…

Project Sabre Cafe Part 20

I drove the bike to work a couple times this week and discovered that I still have an issue with the carbs. It won’t rev past 6K rpms! It’s running on the pilot and midrange but it’s not getting fuel from the mains. I pulled the carbs again and found that I had two of the jets switched around from front to rear. The carbs on a V4 Honda have smaller main jets in the front than in the rear. I cleaned everything up one more time, checked the float heights and reinstalled the carbs. It still won’t get into the mains…

I think I know what the problem is. The slides in a CV carburetor depend on a vacuum in the upper chamber to pull them up. There is a small passage from the throttle bore to the upper chamber and I think mine are restricted by crud and or corrosion. So, next episode will be about solving that problem.

Keep on hackin…

Project Sabre Cafe Part 19

It runs!! The tank and tail light are functional and all that’s left is a paint job.

I went to DMV today and got my license plate for the Sabre! No inspection needed! $18 and out the door, plate in hand. I slapped it on the bike after dinner this evening and went for the first real ride on it. Riding position is perfect! Handling feels like a Sabre, not too sporty but decent in the turns. Carbs had a little burble for a half mile then cleared up. Some piece of crud in the main jet that finally cleared itself. I might have to go back in there if it comes back. Power seems OK, brakes work fine.. well as good as one can expect from disc front and drum rear. I’ll ride it to work tomorrow and leave early so I can take the long twisty way. So far, it puts a big fat smile on my face!

Keep on hackin…

Project Sabre Cafe part 18

I didn’t get done in time for the Bull City Rumble this week, and that was by choice. I decided not to rush this build and do it the way I really want to. I did however dissolve all that foam from the fuel tank and I have the seat mounting hardware installed.

Keep on hackin…