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A couple of hundred RPM before something lets go.... :!:
I was always led to believe that the redline max speed you want to rev it at was very much a function of how long you want it to survive.
Do the CDIs have a rev limiter in them? On a competition bike I'd imagine this would be such that it would survive only a few races at full song. On something like an XR it would want to be several thousand km.
I'd recommend a cheap digital rev counter - even a temporary install of a Trailtech Vapor or similar. These days digital meters are cheaper than mechanical ones. Is there a particular reason you'd need a needle on it?
I was always led to believe that the redline max speed you want to rev it at was very much a function of how long you want it to survive.
Do the CDIs have a rev limiter in them? On a competition bike I'd imagine this would be such that it would survive only a few races at full song. On something like an XR it would want to be several thousand km.
I'd recommend a cheap digital rev counter - even a temporary install of a Trailtech Vapor or similar. These days digital meters are cheaper than mechanical ones. Is there a particular reason you'd need a needle on it?
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- Nov 20, 2001
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- 17,028
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well yeh! try screaming the balls off it just as you hit a jump or bounce a bunch of whoops! road racers use them but we don't on the dirt/ is that because we endo them every 10 miles? methinkso!
as it says in the doc (who wrote that!) 'feet per minute'. i'm going to ask a man who might be able to tell me....
regards
Taffy
as it says in the doc (who wrote that!) 'feet per minute'. i'm going to ask a man who might be able to tell me....
regards
Taffy
I'm sure popup has had a tacho on his FE650 after his second rebuild ( after 10 hours !!) & said he rung the ***'$ off it to 7000rpm before he let the throttle go. No bad considering it probably only took 1/2 a second to get there ! Pm him for the true figure.
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- Jun 13, 2007
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- south east WA Australia
- Joined
- Nov 20, 2001
- Messages
- 17,028
- Location
- Ely, England
"S x rpm x 0.166 feet per minute"
"where 'S' = the stroke in inches"
so according to those figures gazza it's 4,496 FPM. i said it used to be 4,250 in the doc and that it may now be a bit higher!
i will alter the doc's numbers accordingly for the 628.
regards
Taffy
"where 'S' = the stroke in inches"
so according to those figures gazza it's 4,496 FPM. i said it used to be 4,250 in the doc and that it may now be a bit higher!
i will alter the doc's numbers accordingly for the 628.
regards
Taffy
- Joined
- Jun 13, 2007
- Messages
- 3,871
- Location
- south east WA Australia
EEEEEK, that sounds painful
with revised mapping and a decent displacement it could also be limited to 8800
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