REVIEW: Clutch springs

MOD COST: $10-15

MOD DIFFICULTY: Moderate. Requires the disassembly of the clutch.

SPECIAL TOOLS: Impact wrench required.

MOD BENCHMARK: Big increase in initial acceleration, no change in top end.

NEXT STEP: Contra springs.

Clutch springs can be one of the most confusing upgrades you can do to your bike, but also one of the most rewarding mods to your off the line acceleration.

The biggest confusion is in how they are rated. You can get clutch springs in 1000rpm, 1500rpm, and 2000rpm sizes. Most people assume that this rating system is the RPM that the springs engage the clutch. This is incorrect. Its actually the INCREASE in RPM over the stock springs that the clutch engages. So that would technically make your stock springs a 0RPM spring.

All aftermarket springs are also rated by color, the 1000RPM is blue, 1500RPM is yellow, and  2000RPM is red.

The clutch springs control how much RPM is allowed before  the clutch engages completely.
This affects how hard your bike leaves the line, as well as how hard your clutch stays engaged while in motion.

The 1000RPM spring is mostly for those who want a slight bit of improvement in off the line jump, but want to ensure that they don't loose out in the top end at all. These would be good springs if your final goal is to have a bike with a very high top end, and you're not really worried about initial acceleration.

The 1500RPM Spring offers a great off the line jump without costing you much in the top end, and is the spring I use personally in my Buddy.

The 2000RPM spring will give you a HUGE jump off the line, but in testing has been found to not have enough strength to keep the clutch engaged at high speeds, and your top end will suffer badly.

This mod is much like installing sliding variator weights in that the more mods you do down the road, the more this mod helps.