Quote:
Originally Posted by wrh49
It's time to change my drive chain again on my 99 Legend - The rear sprocket doesn't look bad but with 50K miles on it I was thinking of changing both front and rear. Any feedback on tooth# other than stock would be appreciated.
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The stock ratio is 17:43 and you can go to an 18 tooth front sprocket with no problems. That will increase your top speed per gear slightly, increase your fuel mileage slightly and decrease your thrust slightly.
For example, the 18:43 combo is a 6% change from stock with a top speed in first gear going from 55.07 mph to 58.31 mph. Not a huge difference but it could be significant to fuel economy on a highway.
Going down to 16 teeth on front would probably eat the chain guides.
Whatever ratio you choose, be sure that the tooth counts on both sprockets aren't an even number. If you were to go to 18:42 for example, you'd have abnormally fast sprocket wear from the side plates contacting the same areas every time.
Also, the front sprocket wears 2-1/2 time faster than the rear so if you're only going to change one sprocket make it the front one.
Jim