Gearing top end

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Re: Gearing top end

Postby RunningMan » Fri Jun 08, 2018 8:55 am

44T would be more acceleration, less top end. Need to drop teeth on the rear for more top end/less revs.

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2013 Yamaha YFM 700 R
NERFS
Spacers all round
15T front sprocket
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Re: Gearing top end

Postby DatGuyAsh » Fri Jun 08, 2018 9:01 am

RunningMan wrote:44T would be more acceleration, less top end. Need to drop teeth on the rear for more top end/less revs.

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Cheers mate, I'll get a 36t see how that goes.
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Re: Gearing top end

Postby mrtigger » Fri Jun 08, 2018 11:30 am

Larger on rear or smaller on front for less speed more oomph

Smaller on rear or larger on front for longer range and possibility of more speed.

When I say screaming I mean off the redline. Generally speaking a lot of bike engines love high rpm, they're built for it. My cbr lump barely works under 4k it hates it other than in first gear. For some reason, quad engines are not the same and high rpm for prolonged periods can cause major problems. So even with a top end of 75 you're gonna be virtually on your redline and running the engine VERY hard

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Re: Gearing top end

Postby DatGuyAsh » Fri Jun 08, 2018 12:37 pm

mrtigger wrote:Larger on rear or smaller on front for less speed more oomph

Smaller on rear or larger on front for longer range and possibility of more speed.

When I say screaming I mean off the redline. Generally speaking a lot of bike engines love high rpm, they're built for it. My cbr lump barely works under 4k it hates it other than in first gear. For some reason, quad engines are not the same and high rpm for prolonged periods can cause major problems. So even with a top end of 75 you're gonna be virtually on your redline and running the engine VERY hard

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Not just for hitting 75 all the time though.. just I want the extra RPM so it doesn't sound like it wants to blow up at around 50+
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Re: Gearing top end

Postby mrtigger » Fri Jun 08, 2018 6:07 pm

DatGuyAsh wrote:
mrtigger wrote:Larger on rear or smaller on front for less speed more oomph

Smaller on rear or larger on front for longer range and possibility of more speed.

When I say screaming I mean off the redline. Generally speaking a lot of bike engines love high rpm, they're built for it. My cbr lump barely works under 4k it hates it other than in first gear. For some reason, quad engines are not the same and high rpm for prolonged periods can cause major problems. So even with a top end of 75 you're gonna be virtually on your redline and running the engine VERY hard

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Not just for hitting 75 all the time though.. just I want the extra RPM so it doesn't sound like it wants to blow up at around 50+
I know this pain all too well from when it was still a 250, especially running on low profile tires too. Every little helps. Have the opposite problem now. It sounds bored senseless unless I'm ringing its neck which not many roads give me chance to do lol.

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Re: Gearing top end

Postby DatGuyAsh » Sun Jun 10, 2018 10:26 pm

Some guy owns the same LTZ 400 as me and said he had a 15t front and 36t and got an extra 8mph from the 40t rear.
If so I'll be happy but we'll see haha.

Just want the less RPM top speeds.
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Re: Gearing top end

Postby mrtigger » Mon Jun 11, 2018 7:12 am

That's a good result from a sprocket change, one thing to bare in mind tho is majority of quad speedos are inaccurate or calibrated wrong lol

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Re: Gearing top end

Postby DatGuyAsh » Mon Jun 11, 2018 8:05 am

mrtigger wrote:That's a good result from a sprocket change, one thing to bare in mind tho is majority of quad speedos are inaccurate or calibrated wrong lol

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Yeah I think my speedo is out by 3 mph.
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Re: Gearing top end

Postby Patch » Tue Jun 12, 2018 9:46 pm

DatGuyAsh wrote:
mrtigger wrote:That's a good result from a sprocket change, one thing to bare in mind tho is majority of quad speedos are inaccurate or calibrated wrong lol

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Yeah I think my speedo is out by 3 mph.


Was wondering at what speed your speedo was out by “Yeah I think my speedo is out by 3 mph”. Can you explain you comments please? :icon_salut:
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Re: Gearing top end

Postby DatGuyAsh » Tue Jun 12, 2018 9:52 pm

If my speedo does 70mph it'll be doing 73 mph.
It'll be the same on all quads to be honest.
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