hey everyone, just picked up a new trackbike for the season. this one is a 2006 r6. seeing as im a good bit bigger then the guy i bought it off of, I was wondering if anyone could recommend some spring rates for front/rear? im about 275, but should be down to 260 by track season. thanks!
I'm sure others with specific R6 experience will chime in but this can give you a starting point: http://racetech.com/ProductSearch/2/Yamaha/YZF-R6/2006-07 You can go there and enter type of use (Street/Road Racing) and your weight and it'll give a spring suggestion.
awesome. one more question for the moment: if they dont have the exact spring weight recommended, is it better to go softer or harder? for example racetech recommends 12.6 for rear, but only has 11.6 or 14.0
It depends Some people go with one of each spring rate to make the rate you need. If you're making this post, that isn't necessary for you. I would recommend the heavier spring and run less preload. As your pace increases, you'll need more spring. Spring rate charts are only a guide to get you started. Sag is also a measurement you can do with current and new springs to see where you're at. But in the end, all that matters is what works for you. You have to measure and monitor the suspension travel with a zip tie or band on the shock and fork. I prefer to run heavier springs with less preload. If your spring rate changes 2 or more rates over time, it's also time to look at valving. To many people overlook valving. The springs main work to hold the weight of the bike up and provide the basic energy to return the suspension back home after it's travel into the compression stroke. The valving is the magic that makes it all work properly. If you buy a bike from someone that's 150 lbs and you weigh 250 lbs, you'll need valving and shim stack changes along with springs. Building a relationship with a good suspension tuner will pay dividends in your track riding career.
That's good advice. This would also be a good time to get forks and shock cleaned, fresh oil, seals etc. Doesn't Matt Carr of Indy Ducati do suspension?
good point. il see about having him look at it. thanks guys! im by no means out to run like a pro yet but just trying to set myself and my equipment up right.
Matt Carr is a well respected suspension guy and rider. Would not hesitate to bring anything to him. Solid guy
Best approach: Know going in that fresh stuff is better, and that your needs will change (weight fluctuations, skill level, etc.). Develop a relationship with your suspension guy so that he can advise you appropriately, and they will save you money and headache in the long run! -Tom
I would not trust the racetech calculator, I have found that their rear spring rate recommendations are off. Penske has a chart that is more accurate, but the best thing to do as mentioned would be to work with a suspension tuner. http://www.penskeshocks.com/assets/PENSKE SPRING APPLICATION CHART.pdf
How important is fresh oil in your suspension? Fast guys do the fork oil every other race weekend or so. Shock service usually 2 times per season at minimum.