Sprocket ratio for 1/8 mile drag?

[Einsi]

Hi all. Any idea what might be a good gear (sprocket) ratio for a 1/8 mile drag race? '95 750 kat, pretty much stock.

Also, do you recommend the sprockets from the Katstore? Fits without problems? Aluminum ok?

[KAT TOY]

katrider's store probably need the largest rear sprocket you can fit?

[mcssls]

katrider's store probably need the largest rear sprocket you can fit?

Hmmmmmm, thinkin that's kinda backwards

[cintidude04]

Well you wouldn't want a smaller rear sprocket for drag racing.
Question is, is the drag strip the only place you going to be using the bike?
And yes the KR store gets a thumbs up from me on sprockets.

[KAT TOY]

Hmmmmmm, thinkin that's kinda backwards

larger rear sprocket=quicker accel and less top end. for 1/8 mile wouldn't that be what you want?

[kevin2502000]

Top speed you would want largest front, smallest rear. The "stunters" use dirtbike configuration, largest rear, smallest front which gives the most torque to the rear wheel. SO I agree with KAT TOY but not going to the extreme of the stunters ratios.

[scottynoface]

14/50

If I were dragging such a heavy bike I definitely wouldn't touch al sprockets bit that's me.

[Einsi]

Thanks for the comments.
I rarely use the top speed and definitely not on a 1/8 mile strip.
Think I'll go for the aluminum sprockets, If they don't last they don't last

14/50 is a big change from 15/47... would it be terrible for street/road use? Cruising at 60+ mph?
According to gearingcommander.com, 60mph in 6th gear would be at 5300 RPM.

oh and one more thing.. would I need a longer chain for the 14/50 setup?

[hardlydangerous]

you dont want the shortest gearing possible.....

you have to remember a few things
#1 WHEEL SPIN ... you dont want any
#2 front end lift, you want to be able to pull away full throttle in the powerband and keep the front end down. My 750 will wheelie easily from a dead start with 15-45 gearing. Drag racing requires you strat the suspension down to help put the power down and limit lift.
#3 Tires. many street tires wont cut it... Michelin Power pures would be my choise for street track use.


keep in mind you dont want to be shifting 5 times either... taller gearing = less likely to rip off the rev limiter with every gear.

[scottynoface]

Thanks for the comments.
I rarely use the top speed and definitely not on a 1/8 mile strip.
Think I'll go for the aluminum sprockets, If they don't last they don't last

14/50 is a big change from 15/47... would it be terrible for street/road use? Cruising at 60+ mph?
According to gearingcommander.com, 60mph in 6th gear would be at 5300 RPM.

oh and one more thing.. would I need a longer chain for the 14/50 setup?

I thought you said you were drag racing...


My 600 was at 9k rpm @ 90mph or so on the highway with 14/50 gearing.

[GSXFJim]

I'd agree with the 14/50... that would be a good place to start. With the heft of the Kat, I'd use a steel rear.

[Einsi]

I thought you said you were drag racing...

Yep I would buy these sprockets mainly for 1/8 mile drag racing. Just thinking if it was possible to use them also for daily riding.

My 600 was at 9k rpm @ 90mph or so on the highway with 14/50 gearing.

hehe so I guess the answer is NO for daily riding

[cintidude04]

Why would that be a no for daily riding? Thats the gearing scotty used for dily riding.

[Einsi]

Why would that be a no for daily riding? Thats the gearing scotty used for dily riding.

Maybe not that bad, just think I'd get tired of cruising at 9k+ rpm all the time. I know I can't have it all Think I'll swap back to original after the race.

With the heft of the Kat, I'd use a steel rear.

Do you know of anyone who has had bad experience with Aluminum rear on a 750 Kat or similar? I'm not expecting it to last for many years.

[cintidude04]

Maybe not that bad, just think I'd get tired of cruising at 9k+ rpm all the time. I know I can't have it all Think I'll swap back to original after the race.

90 mph speed limits in Iceland? I know where I'm moving