Need help with gearing for PIR

Racingredhead · April 8th, 2013, 07:42 AM

Hi - I'm new to racing and am hoping to get some input into sprocket sizes for the Ridge, Pacific Raceways & PIR. I ran a 17/54 at the Ridge last week but was hitting the rev limiter just after pit wall. I heard some guys are running 14/45 but that works out to be about just a few mph faster at the end of the straight and I'm thinking I'm going to need to go taller than that. Any suggestions??

PS: I'm running a 428 chain and weigh 120 lbs.

PPS: My first race is at PIR so that is the highest priority at the moment. :-)

SPG · April 9th, 2013, 08:44 PM

Depending on rear tire, I run a 18/57 for a 140 rear, and an 18/55 for the 120 rear. This seems to work well at the Ridge and Pacific.
-Sean

Racingredhead · April 10th, 2013, 04:30 AM

Thanks Sean. Appreciate that. I have a 120 rear.

April 8th, 2013, 07:42 AM	#1
Racingredhead ninjette.org member Name: MB Location: Vancouver, BC Join Date: Oct 2012 Motorcycle(s): 2009 R6 race bike Posts: 46	Need help with gearing for PIR Hi - I'm new to racing and am hoping to get some input into sprocket sizes for the Ridge, Pacific Raceways & PIR. I ran a 17/54 at the Ridge last week but was hitting the rev limiter just after pit wall. I heard some guys are running 14/45 but that works out to be about just a few mph faster at the end of the straight and I'm thinking I'm going to need to go taller than that. Any suggestions?? PS: I'm running a 428 chain and weigh 120 lbs. PPS: My first race is at PIR so that is the highest priority at the moment. :-)

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April 9th, 2013, 08:44 PM	#2
SPG ninjette.org member Name: Sean Location: Seattle Join Date: Aug 2010 Motorcycle(s): 250 Ninjette Posts: 94	Depending on rear tire, I run a 18/57 for a 140 rear, and an 18/55 for the 120 rear. This seems to work well at the Ridge and Pacific. -Sean

April 10th, 2013, 04:30 AM	#3
Racingredhead ninjette.org member Name: MB Location: Vancouver, BC Join Date: Oct 2012 Motorcycle(s): 2009 R6 race bike Posts: 46	Thanks Sean. Appreciate that. I have a 120 rear.