9HP In Doodlebug

[big-al]

Is it true that if I put a 9hp engine in my DB, then the top speed will be the same as a 6.5hp but I will get there quicker?

I want to have a really high top speed, but I don't care how fast I get there.

Thanks!

 

[george3]

run a rear sprocket that is smaller. about 10 tooth smaller than what you have.

 

[big-al]

run a rear sprocket that is smaller. about 10 tooth smaller than what you have.

So if I get a smaller sprocket, do I need to get a different size clutch? The clutch I have now is 12t and my sprocket is 70t.

 

[minibburna]

same clutch should be fine...with a smaller rear sprocket you'll go faster, but get there slower

 

[65ShelbyClone]

Is it true that if I put a 9hp engine in my DB, then the top speed will be the same as a 6.5hp but I will get there quicker?

If you don't change the gearing, then yes. You have two practical options for increasing top speed: increase the clutch sprocket size and/or decrease the rear sprocket size. If the 9hp doesn't have the same output shaft size as your current engine, you'll have to get another clutch anyway.

Keep in mind that gearing the bike too "tall"(for more speed) will make the clutch slip a lot more and could cause it to overheat/burn up.

 

[maxkristy]

nugggggggggggggg