my neighbor just put a smaller front sprocket on his 01 zr7s. i didn't get to ride it yet but he said it felt a lot quicker off the line. my question is how much and what are the neg with doing this beside losing top end speed?
A tooth either way on the front is a fairly substantial change.
I went up 1 tooth on the rear and at 100km/h ( 60mph ) it raised
the revs about 500 to around 5100rpm. Touring around 130-140km/h keeps it spinning just under 7000rpm, so top gear roll- ons are definitely improved.
Lowering the front 1 tooth will really make it zip around town, but will rev its brains out on the highway.
One tooth on the front is about the same as 3 on the rear. But try not to mess with the rear because the sprockets are harder to change, they're more expensive and steel sprockets are harder (a little) to find. Aluminum sprockets wear out real fast and the dust off them tears up the o-rings on the chain and makes it worthless quicker. Even though you lube your chain, tiny minute shavings (dust) still comes off the sprocket. Looks kinda like the brake dust on the wheels of your car when it hasn't been washed in a while. The big difference is that it's not colored and harder to see, but it's there.
Also, usually when you add teeth to the rear, you usually have to add a link and 1/2 to the chain and alot of shops don't like to sell 1/2 links.
Yeah, you'll definitely make 'er scream a little at highway speeds. But what a "Canyon Carver" it would be.
I've thought about getting a spare front sprocket with one extra tooth and using it just for long cruises. I could probably use the same chain since it's stretched some anyway. How much of a pain is it to change front sprockets? i.e., is it a relatively quick change (gimme half an hour, I'll be right with you), or a real ordeal?
After you do it a few times, you could get it down to that or less. remove the shift lever, take off the side cover, remove the nut from the shaft (the book says to apply the rear brake when loosening the nut), loosen the rear wheel, slack the chain, remove the sprocket and reassemble. You may have trouble finding a 17 tooth sprocket though. I remember asking the parts guy if one was available and (at that time) he said there wasn't. But that may not be the case now. Dunno. I haven't looked in about a year or so. But if there is one available, I don't think that you have to worry too much about the chain. It should work just fine.
Has anyone tried to increase the size of the front sproket by one tooth? What is the effect on RPM decrease? I think it should be in the region of 500 rpm if decreasing it causes an increase of 500? Does that make sense?
How does the bike feel?
I remember reading that a while back. It's good info. And the way (to me) the conversation goes back and forth, Whitman having set up alot of bikes like that, the 17/35 to him was not much, but he also road raced. So it's relative for him, where as now for me, I've ridden my bike in stock configuration for 16,000 miles. I would feel the difference with one tooth change in the front sprocket.
There's another thread about gearing in the old forum, but I can't find it . It started as one topic and ended up with sprockets. I think this might be the thread where I accused Tom of being an expert on gearing because of his dirtbike days............which he quickly laughed like hell:laugh: and denounced his crown as gearing expert. Hey Tom you remember what thread that was?
Yeah Al, I remember the thread, now I'm on a new mission to find it. Problem is I think we added a comment or 2 about me getting up to Kentucky and drinking a beer or 12 with ya!! Didn't that thread also include me using the phrase, "Fade ya got it Made?? Tom BTW, hope your'e mending fast and not laughing too much.
Tom I have so many drugs in me right now that I would be lucky to find my *** with 2 hands and a search warrent......Actually today the only thing still sore is my shoulder.....even took a walk today. Back to the sprocket .....I believe someone did change the back gear and even posted a company that made tooth range we were looking for. I checked out more than a few threads and came up blank. Anybody care to know what Kaw charges for a ZR7-S windshield.......this is good..........get a chair.........248.00