Weird.

Anyway, most people go with the 520 conversion for, primarily, weight savings. That's the only reason. They might say "I had to change my sprockets/cahin anyway and wanted to convert it to 520 at the same time."

Nominal weight savings when placed on the scale, true. But it's the UNSPRUNG weight that really holds the value of the 520 conversion. I forget the ratio, but it's exponential weight savings when speaking in terms of unsrung weight. (IE: changing to carbon fiber wheels. May be 15 pounds less than stock but since it's unsprung weight, it'd be like a 60+ pound difference in how it "feels" when riding.)

 

Does messing with the sproket sizes mess up the speedometer at all?

Also, how many miles should a stock chain last or be replaced at?

 

Messing with the sprokets will mess the speedo. Not to sure how long a chain really lasts. I a curios to know. A speedohealer will fix the speed thing.

 

Thanks!

 

Changing your gear ratio will affect your speedo by the same percentage as the teeth you added or lost. get a speedohealer, trailtech vapor, or GPS unit.

A Honda OEM chain will last approx 10k miles, because its a huge, heavy tank of a chain. Aftermarket chains will last less time than this, but relieve some of the rotational mass, even if you don't change the pitch. Lowering the pitch will drastically reduce the life of all parts, but also drastically increasse performance.

 

Exactly. I had 1.5pounds total difference between my stock sprockets and 525 vs my rk chain and renthal sprockets. When I already needed new chain and sprockets and the new setup will last at least as long as the stock setup did then why not? I got 16,000 out of my stock stuff, Im at 11,000 now on the new setup and the chain isen't even at the half way stretch mark.

 

you dont need to change your chain, it is lighter but like the other guy said if ur not a pro racer then dont worry about it. on the other hand u change ur spockets -1+2 u will get lots of torque wheelie for fun but u lose some top end speed which u never use anyway

 

I don't think anyone really ever quantifies this stuff:

Changing to a lower pitch chain will increase the speed at which you can flip between gears. We're talking fractions of a second, here. If you are not racing, then you will have zero need for this.

Changing to lighter sprockets takes that load off the engine. You gain about 2-3 HP. MODERN light sprockets and chains actually wear pretty well.

Changing your sprocket ratio can have drastic effects on accelleration, engine braking, and torque. My -1/+2 really ups the accelleration in the lower gears and taking off from the line, but because of the smaller front sprocket, it ups your RPM\Speed ratio by about 1k. Sucks up more gas, and has you cruising at 5-7k, but you get used to it. It knocked my top speed down to about 121MPH, which I've only hit once just to see where the sprockets made it end up. Speedo is off by about 10% (reports 50MPH when I'm really going 45).

 

tooot goes the horn

 

Dudeeeee!!!! I lost like 10lbs and I smoked that fat bastard on the GXR750!!! Not really LOL.. Funny though.