need to change gearing for nitrous..like...tomorrow.

[FTMFW]

im running way behind, and have to have the bike set up for saturday, will be/should be the first time i actually hose the bike, with the exception of the dyno.

so heres the question.

2008 busa, right now the bike has 1 down, 2 up gearing. i bought a bunch of sprockets from vortex as i want to get to maxton later this year, and i knew i'd be doing some tweaking, so ive got a few to choose from.

right now, with -1/+2 gearing, i go through the traps at 140, top of 4th/bottom of 5th gear on a good run (i know, low mph, i weigh like 325 suited). what would be ideal gearing to go with, i had a rider that was going to test it on spray, he made a hit on motor, and said that he'd run out of gear on spray, so it got me concerned. im thinking about switching to stock front sprocket/+1 for spray.

anyone have any experience they could pass my way

 

[Draco1340]

If your running into 5th with 17/45 gears, your in a bad gearing range. If the front end is staying down OK, you can go with a 16/45 or even a 16/46 and use most of 5th gear. This gearing will also give you the advantage of getting the clutch out easier and faster in 1st, and give you a bit more rear wheel torque off the line. If your only using 4 gears, your not maximizing the torque to the rear tire. The extra .080 seconds you lose for the extra shift is more than made up for with extra torque in first.

 

[AQTCJAK]

Goto to Gearing Commander: Motorcycle Gear Ratio Calculator for Sprockets RPM Speed Chain you have got your sprokets confused a stock 08 will out run you without nitrous & limiter removed

 

[BiggDaddyBusa08]

im running way behind, and have to have the bike set up for saturday, will be/should be the first time i actually hose the bike, with the exception of the dyno.

so heres the question.

2008 busa, right now the bike has 1 down, 2 up gearing. i bought a bunch of sprockets from vortex as i want to get to maxton later this year, and i knew i'd be doing some tweaking, so ive got a few to choose from.

right now, with -1/+2 gearing, i go through the traps at 140, top of 4th/bottom of 5th gear on a good run (i know, low mph, i weigh like 325 suited). what would be ideal gearing to go with, i had a rider that was going to test it on spray, he made a hit on motor, and said that he'd run out of gear on spray, so it got me concerned. im thinking about switching to stock front sprocket/+1 for spray.

anyone have any experience they could pass my way

Im a BIGG man myself 380 punds suited up. What rpms do you launch and does the engine bog down when you launch? Are you extended and how much? I was using 16/47 gearing when the weather was cooler and was running low 10's As the weather gets hotter the engine would bog down a little and really start to hurt the ET. I put a 50t rear sprocket on it and it didnt bog any more and my best et was 9.90. With the 16/47 I was using 5th gear and my shift light would be comming on as I got to the finish line. With the 50t I am using 6th gear now My bike is lowered 1" front and rear and extended 8". Hope this helps.

 

[FTMFW]

If your running into 5th with 17/45 gears, your in a bad gearing range. If the front end is staying down OK, you can go with a 16/45 or even a 16/46 and use most of 5th gear. This gearing will also give you the advantage of getting the clutch out easier and faster in 1st, and give you a bit more rear wheel torque off the line. If your only using 4 gears, your not maximizing the torque to the rear tire. The extra .080 seconds you lose for the extra shift is more than made up for with extra torque in first.

i had used a 16t front with the 46 rear and it wheelied too hard, i only caught the mildest one on video as luck would have it. video here

- 2008 hayabusa @ byron, 11-2009[/url]

granted, some of that was improper riding, but it was doing it all day and i was frustrated. 60's were staying consistent low 1.6's (which wasnt too far off of my average)

it also bogged, cuz i couldnt give it enough rpm and slide out the clutch right.

so i think 17 or 18 front would be good. what is the ideal gear/rpm to be going through the traps at?