Thank you...........

 

What will you be doing with the bike? Are you a street rider and occasionally hit the freeway?
I know I have a 929, but with +3 in the rear I had a 500 rpm increase in all gears. You can tell and it a little buzzy on the freeway and I lost fuel economy. If you decide to go with -1 and +2 the bike will be substantially higher in rpm on freeways and long stretches.

As far as 520 you will need to change both sprockets and chain. Go with a -1 in the front it is cheap (around $25) and the easiest part of the mod to do.

When you do the change your speedo will read faster, thus, adding undue mileage to your tripmeter. Install a www.speedohealer.com to allieviate this problem.

 

HAHAHAHAHA thank you!!
when i had a -1/.....whatever stock is....i had a 50 tooth rear.....my speedo said 180 somthing HAHAHA your on crack if you think an f4i gets in the 170s.....

 

my 2004 f4i stock would come up no problem in first and had to clutch it up in second... last month i added vortex -1 +2 and i feel a big difference in acceleration and higher rpms.... first gear wheelies are kinda insane clutching where as power wheelies feel much better in first now, havent had much time to ride seeing i live in mass and the weather sucks but cant wait to see how 2nd and 3rd do wheelie wise... heading to daytona march 3rd on her so plenty of riding time there just hope the weather is nice

 

Let me know if you still have to clutch it up in second...with the -1/+2
Im planning on changing sprockets very soon...
Is it expensive to recalibrate the speedo?

 

ill try and let you kno when some good weather arrives cuz we got hit with around 15 inches of snow but its starting to melt..... speedo healer is around 90-100 dollars

 

Allright, about this F4i not getting into 170MPH range. When I get my tank cam I will aim it at the speedo and let you guys see it.

Always neh saying.

Doubters
[>:]

 

If you want me to believe then borrow a GPS and aim your camera on that. Stock speedos tend to be about 7 percent happy. That means if you're showing 170 then you might only be doing 159. Don't get me wrong 159 is hauling a$$ but that's about where a 600 tops out unless is has some serious engine mods.

Almost forgot -- almost all GPS units will have a high speed recall so wait til the run's over before taking any pics. After I first posted I had a terrible image of you sitting up to take a picture and flying off the bike[]

 

no way the bike is doing 170, im sure the speedo reads it but like previously stated the speedo is 7%-12% off from the factory... your prob topping out around 150-160

 

I did the -1/+1 on my F4i, and after doing the exhaust and remapping and all that, the Dyno reported a top speed of 140mph, while the speedo was reading 162mph. That's a huge difference. So I got the speedo healer and recalibrated the speedo.

I am considering swapping out the rear sprocket for a +2 to see how much extra power I get... Might drop my top speed to 135mph but it should be wicked quick acceleration getting there.