I
Irish John
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The attached is a message from Don Grube. My query is given that the large pulley wheel in the old 4G was way too large and consequently the drive to the rear wheel was all wrong will this one get it right? The maths guys on this forum will surely know whether this GB will work adequately like the Mark2& Mark3 gearboxes did with an 11T chain sprocket to a 48T rear wheel sprocket on a 26" wheel? I'm worried that the reduction in size of the rear pulley wheel will be diminished by the reduction of the chain sprocket from 11T to 10T.
Don's Message:
These pics. will be posted on our grubeeinc.com web site in 4G 4 cycle section in the coming weeks; By viewing now you can have first look see at the new 2010 4G upgraded transmission with one-way brg. 80T pulley and 10T soild drive.
FYI: A conversion kit will take a 2009 model to 2010 specs. with a simple shaft and pulley change.
The new 2010 4G PL/PO form has all items listed. Please acknowledge if interested.
Cheers:
Don and Angel China GAS
Don's reply to my query that the ratio being wrong again:
You can have choice of 36T, 44T, 48T or 50T rear wheel sprockets. Now do the math. with a 4 to1 trans. ratio and 10T chain drive sprocket. You worry to much. Cheers Don
My answer is I don't know but if he lent me one for 2 weeks I'd be able to tell him what rear sprocket size, if any, it works best with. I do worry I suppose because of my experiences with the first 4G which was documented elsewhere last August.
Don's Message:
These pics. will be posted on our grubeeinc.com web site in 4G 4 cycle section in the coming weeks; By viewing now you can have first look see at the new 2010 4G upgraded transmission with one-way brg. 80T pulley and 10T soild drive.
FYI: A conversion kit will take a 2009 model to 2010 specs. with a simple shaft and pulley change.
The new 2010 4G PL/PO form has all items listed. Please acknowledge if interested.
Cheers:
Don and Angel China GAS
Don's reply to my query that the ratio being wrong again:
You can have choice of 36T, 44T, 48T or 50T rear wheel sprockets. Now do the math. with a 4 to1 trans. ratio and 10T chain drive sprocket. You worry to much. Cheers Don
My answer is I don't know but if he lent me one for 2 weeks I'd be able to tell him what rear sprocket size, if any, it works best with. I do worry I suppose because of my experiences with the first 4G which was documented elsewhere last August.
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