Hey all, and CyberPoet, I just changed out my sprockets, ordered at 15/48 combo just wanted to go one up nothing big. read around here that the stock was 15/47, turn out, my stock rear is 45! So now I'm +3 in the back, did you all know 45 was the stock in the back? Did it change in '05?
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Re: 2005 Sprocket Change?
Originally posted by seypeaSo now I'm +3 in the back, did you all know 45 was the stock in the back? Did it change in '05?
Cheers,
=-= The CyberPoet
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Originally posted by jmanor010780I am lookig at chaning gmy 02 750 3 up in the rear but can't afford the speed healer would I still feel a difference without it and does it change the spped o (I don't want to be off speed wise don't mind the revs)
See the sprocket tables on my website for the percentages of change. If your stock sprocket is 45 instead of 47 tooth, you can find the formula's as a link on that page to calculate your own percentage of change.
Cheers,
=-= The CyberPoet
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the speedohealer doesn't do anything for your performance, just calibrates your speedo/odometer so the read accurately since stock is off and if you to a sprocket change, it's off too.
Going +3 in the back I was really worried about my freeway revs since I do a lot of freeway riding but it seems okay to me, perhaps I'm going slower not though since I have yet to install the speedohealerRay - Thank you, may I have another?
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Ok because I am really slow I am confused if I am wrong please correct me. If I go up 3 in the back which possibly will be 50(if my rear is 47 ) and stay stock int he front I will see a 6 percent difference. Since i can't get the yellow box/speed healer I speed o will be off so if I my speed says I am doing say 50 I am really doing 53ish. So I could get away with no using the healer for a month or so but think my speeed o is off close to 5mph . I would not have to replace my chain it has 4000 miles on it or the front sprocket. Also I would feel a little difference going up 3 in the back would that add hp to the bike?
I am sorry if this has already been answered I am grateful for any and all help
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Originally posted by jmanor010780Ok because I am really slow I am confused if I am wrong please correct me. If I go up 3 in the back which possibly will be 50(if my rear is 47 ) and stay stock int he front I will see a 6 percent difference. Since i can't get the yellow box/speed healer I speed o will be off so if I my speed says I am doing say 50 I am really doing 53ish. So I could get away with no using the healer for a month or so but think my speeed o is off close to 5mph . I would not have to replace my chain it has 4000 miles on it or the front sprocket. Also I would feel a little difference going up 3 in the back would that add hp to the bike?
(B) A 6% under-reported amount about cancels out the OEM over-reported amounts. By law all vehicle manufacturers have to have a certain amount of over-reporting (USA/Canada/EU -- not sure about other places); this is a result of liability issues in the past where people claimed their vehicles were speeding without their knowing as the fault of the original manufacturer. The standard over-reported amount on any new vehicle is around 5.5%, and a bit higher on motorcycles (5.5 - 8.5% is normal, rates as high as 10% are still common). In part, this is also designed to ensure that your speedo doesn't over-report if you are running tires that are the same "shelf tag size" (i.e. 150/70ZR17 rear on a 98+ Kat) but in reality are slightly larger than the OEM tires that came with the bike.
You can find more details on these two webpages of mine:
Understanding Motorcycle Sprocket Ratios & Sprocket Ratio Math and
Katana Sprocket Ratio tables and notes
Cheers,
=-= The CyberPoet
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