Question about Yamaha XJ 600 Motorcycles

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I have a top speed of 75 mile on a 1997 xj 600n, its running 16 48 gearing, what is standard, has no restrictors in the carbs, all 4 plugs and brownish colour, all exausts are same temp when warmed up,

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How many RPM are you turning in top gear at top speed? If you're not red lined, your engine is not pulling the gearing. You may be overgeared. You an try dropping to a 15 on the front. It's cheaper to change the front gear. See what it does. It may peak but at a slower speed. Then again,it depends on how many RPM you pick up. You could bring the gearing into a range where the engine can now pull the gear and actually increase the top speed of the bike by dropping down a gear. I've seen it happen many time. If not, you'll have to do something to get the power of the engine up.

Good Luck
steve

Posted on Sep 29, 2010

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