Sound reasonable for a brand new engine?
I'm running a 25 tooth on the output and the gearbox cog is an 18 tooth.
I have downsized to a 18" rear wheel which should lower RPM at top speed slightly.
The fuel limiter I thought was for acceleration so shouldn't affect the top speed?
Enfield + 10HP = 55mph Max (GPS)
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snoopy
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Enfield + 10HP = 55mph Max (GPS)
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Sphere
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Re: Enfield + 10HP = 55mph Max (GPS)
I'm not sure what you mean by this, but downsizing the rear wheel will mean more rpm for the same speed.snoopy wrote:Sound reasonable for a brand new engine?
I have downsized to a 18" rear wheel which should lower RPM at top speed slightly.
'92 Enfield + Hatz 1B40: street legal, weld up stainless exhaust, check engine rpm and change final drive sprocket.
Re: Enfield + 10HP = 55mph Max (GPS)
Snoopy, with a 19 inch rear wheel & standard tyre, an 18 gearbox sprocket will give 58.3 mph @ 3600. Although this is slightly beyond the capabilities of a 406 yanclone on dead level ground & calm conditions. (I'm assuming this is the engine you have from the power quoted) - although my 406 is rated at 8.8 bhp max. 
With an 18 inch wheel, you are probably geared the same as if you had a 19 inch wheel & 17 sprocket, which works out at 55.07 mph @ 3600. So it sounds to me as if your engine is hitting its full rated rpm, & your bike is going as fast as its ever going to at normal maximum engine revs. Your gps seems to confirm it.
With an 18 inch wheel, you are probably geared the same as if you had a 19 inch wheel & 17 sprocket, which works out at 55.07 mph @ 3600. So it sounds to me as if your engine is hitting its full rated rpm, & your bike is going as fast as its ever going to at normal maximum engine revs. Your gps seems to confirm it.