 Sprocket ? |
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 Nov 6 2009, 08:20 PM
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#1
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YFZ450 Racer Group: Members
Posts: 21
Joined: 28-October 09
Member No.: 22054
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So My quad just tops out way to fast for me. Ive read that alot of people change the front sprocket from a 14 to a 15, But how much more top end does that really give you. Is the a formula that you can use to find a what speeds you can reach with what size sprockets. I was also told that there is a ratio change on the sprockets like if you change to + or - 1 tooth on the front its equal to + or - 3 on the back, Does anyone know if thats true.
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Nov 6 2009, 08:20 PM
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Nov 6 2009, 09:07 PM
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#2
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 I sware to drunk I'm not god Group: Members
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Joined: 23-September 08
From: CANADA EH!
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if you add a tooth in the front, its like loosing 3 teeth in the back. But, the smallest rear sprocket you can have is a 36 (stock is 38)
My next gearing swap is a 36 rear. I dont want a full 15 in the front. And rear sprockets are much easier to change. |
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Nov 6 2009, 09:12 PM
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#3
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YFZ450 Racer Group: Members
Posts: 21
Joined: 28-October 09
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So going down in the rear will give me better top end, but is there a way of calculating how much Ill gain.
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Nov 6 2009, 09:15 PM
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#4
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I sware to drunk I'm not god Group: Members
Posts: 3291
Joined: 23-September 08
From: CANADA EH!
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QUOTE (Creeper @ Nov 6 2009, 10:12 PM)  So going down in the rear will give me better top end, but is there a way of calculating how much Ill gain. divide your drivenn gear by your drive gear, giving you your ratio. Thats as far as i know for ratios and that. ex: 38/14=2.714 ratio |
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Nov 6 2009, 09:25 PM
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#5
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YFZ450 Racer Group: Members
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Ya but what im trying to figure out is if I top out at 60 on stock then what will I top out at if I go up 1 in the from or down 2 in the back
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Nov 7 2009, 07:40 AM
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#6
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I sware to drunk I'm not god Group: Members
Posts: 3291
Joined: 23-September 08
From: CANADA EH!
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QUOTE (Creeper @ Nov 6 2009, 10:25 PM) Ya but what im trying to figure out is if I top out at 60 on stock then what will I top out at if I go up 1 in the from or down 2 in the back search on google or sometihng. Theres gotta be a calculator of some kind for that. |
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Nov 7 2009, 08:08 AM
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#7
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 I can physically dominate. Group: Members
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From: Woodinville, WA
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If you're topping out at 60 mph and you add one tooth to the front and drop two in the rear, your top speed will then be around 68 mph.
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Nov 7 2009, 09:10 AM
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#8
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YFZ450 Racer Group: Members
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How did you come up with those numbers
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Nov 7 2009, 12:44 PM
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#9
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 no regrets just lessons learned Group: Members
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From: coal region,pennsylvania
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if you add in the front its like gain 3 in the back.... yfz you had that backwards
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Nov 7 2009, 05:10 PM
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#10
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YFZ450 Racer Group: Members
Posts: 21
Joined: 28-October 09
Member No.: 22054
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So you go up in teeth to add more topend. But how much do you gain per teeth in the topend, front isnt a big deal to change cause its only like 20 bucks but the rears are like 60 so I dont want to have to buy to many.
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Nov 7 2009, 05:29 PM
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#11
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no regrets just lessons learned Group: Members
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Joined: 18-June 08
From: coal region,pennsylvania
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if you go up 1 tooth i think you will be very pleased :) in the front that is
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Nov 7 2009, 06:09 PM
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#12
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I can physically dominate. Group: Members
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Joined: 24-July 05
From: Woodinville, WA
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QUOTE (08yfz45031 @ Nov 7 2009, 12:44 PM) if you add in the front its like gain 3 in the back.... yfz you had that backwards False, Kaleb was correct. |
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Nov 9 2009, 08:00 PM
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#13
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YFZ450 Racer Group: Members
Posts: 21
Joined: 28-October 09
Member No.: 22054
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Well I picked up a 15 tooth sprocket today. Gonna try to put it on, anyone got any helpful tip or tricks
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Nov 9 2009, 08:58 PM
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#14
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YFZ450 Racer Group: Members
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From: Washington
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QUOTE (Creeper @ Nov 9 2009, 08:00 PM) Well I picked up a 15 tooth sprocket today. Gonna try to put it on, anyone got any helpful tip or tricks I have the following mods and the last time I ran my quad at top speed I think it was 74 mph. I know it was in the 70's. Stock tires Hotcam's - intake and exhaust cams LRD full system exhaust K&N air intake stock CDI Front gear is a 15 and rear is stock About a year ago I got a aftermarket CDI box and installed it but have not done another top speed fun yet. |
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Nov 10 2009, 04:55 PM
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#15
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YFZ450 Racer Group: Members
Posts: 21
Joined: 28-October 09
Member No.: 22054
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Ive got the K&N stage 2 hotcams slip on exhaust and now the 15 sprocket,
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