Aside from the obvious choice of a rejetting it there are other 2 options both of which I use on my bike. The washer under the carb needle is a common mod that will richen the mixture from 1\4 throttle on up. I run this and while I believe it will somewhat shorten the life of the needle and possibly the jets it's a risk I'm willing to take. Much improved response throughout most of the bike's range and the flat spot at 4000rpm is gone once the bike warms up.
The other is giving the carbs adjustable mixture needles. http://www.johnsmotorcycleparts.com/catalog/product_info.php?products_id=28 I can confirm that the needle profile is a direct match for the Keihin carbs my 82 CB450SC comes with. These are likely to fit just about any Keihin carb but as always buy at your own risk. Or you could keep the stock needles and get a right angle screw driver and simply put up with them being harder to adjust. This will richen the mixture throughout most of the range but the biggest difference will be below 1\4 throttle which is where the bike is run 95% of the time anyway. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
