How many RPM at 60, 70 ? MK1a

C

Cdntiger

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Hi,
I had my Tiger out on the highway for the first time last night and my tach is way off. It was showing 4000 @ 60, and pinned on the redline at 70! :eek:
My car is bone stock, should be about 2800ish at 60, 3200ish at 70?

Thanks,

Paul
 
Cdntiger said:
Hi,
I had my Tiger out on the highway for the first time last night and my tach is way off. It was showing 4000 @ 60, and pinned on the redline at 70! :eek:
My car is bone stock, should be about 2800ish at 60, 3200ish at 70?

Thanks,

Paul
Click to expand...

Suggest you use a GPS or phone Navigation to check your true speed.
Mine is very accurate doing 2000 RPM at 65 but that is the advantage of a 5 speed.
 
Should be 24 mph per 1000 rpm in high gear. My tach was way off like that when I first got my Tiger. Had to replace a timing capacitor inside the tach to make things match up.
 
big_mike_85614 said:
Should be 24 mph per 1000 rpm in high gear. My tach was way off like that when I first got my Tiger. Had to replace a timing capacitor inside the tach to make things match up.
Click to expand...

Thanks Mike,
I know the spedo is is accurate or close to it, definitely the tach is off, the delta gets greater as speed increases.
Where did you get the timing capacitor? I've never heard of one?

Thanks,

Paul
 
Math

Tire size? how far one revolution? pie R square

Rear Gear 2.88 or whatever?

Calculate how many turns per mile? or 5,280 feet.

Mile a minute at 60 mph rpm? Times 1.667 at 100mph

Someone has done a spread sheet for this.
 
Thanks, very interesting, I'll have to read it again a couple of times to see if it's within my capabilities to calibrate it myself.
Is there anyone that does these? If yes, any idea what they charge?

Thanks,

Paul
 
When I fixed mine, I got a $14 no-contact tach off Ebay. Put a reflective strip on the flywheel, pointed the no-ccontact tach at the strip, and set the engine to 3000 rpm. Then ran around to the cockpit and with the regular tach hanging out of the dash, turned the calibration pot so the tach read 3000 rpm.
 
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