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Posted

so i am going to either order a stock tranny or straight cut gears from jeff at FAST tommorow.

 

Question?: Why would i want to run straight cut gears? Is it worth the price diffrence? What gains are there? What disadvantages are there?

Posted
so i am going to either order a stock tranny or straight cut gears from jeff at FAST tommorow.

 

Question?: Why would i want to run straight cut gears? Is it worth the price diffrence? What gains are there? What disadvantages are there?

 

straight cut gears mainly relieve stress of the crank and bearing on the pto side, mainly on HIGH HORSEPOWER engines.

you can also get them in different ratios to change your gearing a bit, helps dragging asphalt.

i have them in my 4mill cub. was told that i didnt need them and got them anyway for piece of mind.

depending upon where are intend to go with your engine, the money you are looking at spending

on the straight cut primarys could be better utilized somewheres else.

Posted
so i am going to either order a stock tranny or straight cut gears from jeff at FAST tommorow.

 

Question?: Why would i want to run straight cut gears? Is it worth the price diffrence? What gains are there? What disadvantages are there?

My bike is in my sig and running stock gears. I was told 100hp and above is a good idea to run straight cut gears.

Posted

basicly straight cut gears are on the output shaft of the crankshaft and the input shaft of the cluch (mounted to the back of the clutch basket) and they replace the helical cut gears that come stock.

 

straight cuts...

 

primaries_mid.jpg

 

helical cut....

 

31K161501000.gif

 

basicly the helical cut gears try to "walk away" from each other when the power is applied causing alot of side load on the crank bearings as well as the input shaft of the transmission.

 

a set of straight cuts and a tz bearing on the output side of the crank are pretty much the cats ass if you've got the coin to do it while your into it...

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