I have the same 'flat spot' in my 18RG, never had the spare money to actually have it fixed. I put a vacuum gauge on the engine to monitor what goes on (what causes the problem). When you first open the throttle from cruise, there is a sudden drop in manifold vacuum. This is a result of a low volume intake manifold and four rather large throttle plates. This drop in vacuum results in slower air flow through the carbs. (I know the accelerator pump plunger pushes in fuel as the accelerator is depressed.) The result is a 'flat spot' until the engine picks up revs. Depressing the clutch and giving it a 'blip' will over come the problem as the engine is able to rev up quicker when the clutch is in.
I have kinda got used to it and just drive around it. I am sure that it could be fixed with a bit of time and effort and someone who knows what they are doing with the carbs.
Interesting to see how many other 18RG drivers experience anything like this too.
Mon, 19 May 2003 03:18
