Apr 26, 2020 · When you slightly close the throttle then the increase in vacuum lifts the slide a bit more to pull out better. When the valves are not set many of them can be at close to zero to make you lose …

Jul 19, 2024 · Won't rev over 5000 is often due to weak charging. You should have 14.4 VDC measured at the battery at 3000 RPM on a full battery. The backfiring could be from a header leak or leaky …

Mar 18, 2022 · You may have an intake leak between the carburetor and the head, so take a spray bottle of something flammable (gasoline, choke spray, starting fluid, brake cleaner, etc.) and spray it …

Dec 15, 2014 · If you can check this, then you will be able to tell that the computer is firing correctly at 5000 rpms and be able to rule that out as a possible problem. What you *dont* want to see …

If the bike has been sitting without being run for 30 days or more with gas in the carbs, the carbs need to be cleaned. To properly clean them, they need to be removed from the bike, disassembled and …

In this video we look at the carb sync on this 1979 CB750. We learn the importance of double checking our work even after a perfect carb clean and bench synchronization and a fairly...

Oct 23, 2024 · Runs great with fresh carbs but does have some valvetrain noise, comes and goes with RPM but going down the road at 3K or 4K rpm it's quiet and smoothe. I did sync the carbs too so …

May 3, 2011 · Anyone have a good procedure for adjusting and syncing carbs (assuming that everything internally is correct and clean)? I've always been able to muddle through it but always felt there had …

Feb 23, 2021 · The ignition IS weak but more important to get control of the carb slides or it never runs right and the rpm bang out limit will just get lower and lower. Then at some point the engine begins to …

Sep 21, 2019 · Likely an air (vacuum) leak when the carbs were removed and installed after the ring job. Cracked intake manifolds to the head, they do it all the time. If you have the added vacuum demand …