M-TRUX
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| posted on 5/11/13 at 02:32 PM |
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YAMAHA R1 '08 in OFFROAD
AWSOME Engine. 400Kms of testing
TOP SPEED: 170Km/h
Original clutch burned on our first race - BAJA PORTALEGRE - Muddy conditions
WE need to reduce the 1st gear so the engine does not stall in rivers or uphill muddy/rocky conditions. The Top speed may be reduced to about
140km/h.
Can anyone help us out? We need a stronger clutch and the 1st gear more suitable for offroad.
FACEBOOK GALLERY
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twybrow
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| posted on 5/11/13 at 02:40 PM |
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Is this chain driven? If so, can't you just change the rear sprocket to alter your gearing? As for the clutch, I assume it burned out because of
the gearing, and because you were having to slip the clutch a lot? Most of us running bike engines swear by the OEM plates, with stiffer springs. I
have only heard bad things about after market 'uprated' clutch plates.
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Minicooper
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| posted on 5/11/13 at 04:16 PM |
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It's not chain driven, but as has been said above if you change the overall gearing to 140 top speed then your 1st gear will be a lot lower.
I don't recognise the transmission but it looks like a differential with some sort of drop gears on the input end
David
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M-TRUX
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| posted on 5/11/13 at 04:45 PM |
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[img]https://www.facebook.com/photo.php?fbid=555331371183573&set=a.434373566612688.111309.209576825759031&type=3&theater[/img]
This is one prototype gear box, direct ratio with inverter. The PEUGEOT Diff. ratio in use is 35/9 (3.89). I will look for one 34/8 (4.25) used on the
504 vans. This will give me less top end but the 1st gear will still be too long. Where can I find Gears for this R1 Engine??
[Edited on 5/11/13 by M-TRUX]
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M-TRUX
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| posted on 5/11/13 at 04:47 PM |
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Also: Where can I find the stiffer springs for this use?
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adithorp
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| posted on 5/11/13 at 05:01 PM |
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Barnett heavy duty springs will sort the clutch. AB Performance have them in stock and have good service.
Have you modified the oil breather system. It's vital in a track car so probably a good idea in yours.
Not sure there's a lot you can do about the gearing. Race bikes probably used a different set but they're not cheap I expect.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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twybrow
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| posted on 5/11/13 at 05:17 PM |
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quote:
Where can I find Gears for this R1 Engine??
[Edited on 5/11/13 by M-TRUX]
Try Nova Racing - they mention every year of R1 on their website, apart from the 2008
model! But worth giving them a call, as I know they can make custom gears and they are very helpful people.
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Minicooper
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| posted on 5/11/13 at 05:17 PM |
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http://www.novaracing.co.uk/
Nova racing can make anything for you, here is a quote from their website
"As well as supplying complete motorbike gearsets, we also can also provide alternate ratios for standard motorbike gearboxes by supplying
adjusted ratio gear pairs as a direct replacement to the standard gear ratio"
Cheers
David
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Minicooper
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| posted on 5/11/13 at 05:18 PM |
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Dam several seconds to late!
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M-TRUX
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| posted on 5/11/13 at 06:46 PM |
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THX GUYS - These brands are enough... I'll keep you UP-TO-DATE.
We will have a 3 hour endurance race in the end of this month
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M-TRUX
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| posted on 4/12/13 at 04:56 PM |
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Crank broken.
We where racing in 1st position !
1300 suzuki??
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