Modifications - Performance Discuss aftermarket and DIY performance modifications

Considering a Sprocket Change

Old 03-18-2008, 10:14 AM
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Considering a Sprocket Change

Iv been thinking about doing a Sprocket change for some time now and have finaly decided to order the parts and do it.

Iv got a few questions that id like some opinions on:

Iv been considering going with 15/41 gearing. I want to have a bit more acceleration through the gears and be able to pull the front wheel up in second easier (right now i guess the bike needs a tune-up because on the stock gearing i have to stand and really bounce hard on the front to get it up in second) is the 15/41 a good setup for the street or should i go with a different setup?

Iv been looking on www.bikebandit.com and noticed that the only way to get chains and sprockets through them as well as some other sites as one kit is with the stock sizes. I was wondering if anyone knew of a good place to go to get different sizing in the kits at a good price?

Also, when pricing out buying the parts separately on www.bikebandit.com I couldnt really decide if I should go for steel sprockets or aluminum ones. I understand that there is a performance gain to be had with the rotating mass you lose going to aluminum but do they wear out too fast to make it worth it?

Thanks ahead of time guys.
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Old 03-18-2008, 10:36 AM
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IMHO 15/41 should be fine for the street and you should be able to use your stocker chain unless it's already stretched way out...

It's a nice little DIY project you can do in no time...just order the new 15 tooth front and I think it should be hardened steel...good luck bro!
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Old 03-18-2008, 11:02 AM
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I like 15/43, but some consider it too buzzy for the street. You don't lose any top end with the shorter gearing and you get a noticeable improvement in acceleration in any gear from any speed.
For the street I would go with steel sprockets.
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Old 03-18-2008, 11:09 AM
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+1 on the 15/43 Killer! I love that setup, but if you run down the interstate at 90 mph a lot you may not like carrying the higher RPMs that cause the buzzing and you'll need a speedo healer for sure with the 15/43, but stocker chain works great with that setup too...
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Old 03-18-2008, 12:13 PM
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i went with the Sum of All Parts 520 kit and was very pleased with the results

http://cgi.ebay.com/ebaymotors/HONDA...spagenameZWD1V
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Old 03-18-2008, 12:18 PM
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theres nothing wrong with your bike. i havent yet heard of a stock superhawk that can pull up in second without dumping the clutch. im considering a sprocket change too, i just havent thought about it much yet.
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Old 03-18-2008, 12:23 PM
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+1 on the 520 kit for $160 Radio!

Did you add a speedo healer? I found that with the 15/43 setup I was actually running 70 mph when the speedo read 80 mph, so I put on a healer on and reads correctly now!

http://www.calsportbike.com/cgi-bin/...d=1988&count=1
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Old 03-18-2008, 01:20 PM
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i did not because i was running a magnet operated speedo

but i can definitely say the ol butt dyno was more than impressed with this simple upgrade. the front end sure feels lighter after the change
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Old 03-18-2008, 01:53 PM
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15/43 all the way! Aluminum sprockets aren't the best, but for $160 on Ebay, its not that big a deal. Just stay up on your chain adjusting and keep it lubed. I usually readjust every couple three hundred miles.
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Old 03-18-2008, 04:24 PM
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seems like on bikebandit.com the steel rear sprockets are the cheapest anyway, and will probably last longer right?

you guys have me seriously considering the more aggressive 15/43 setup.... any idea what these two setups do to the already low top speed of the superhawk?

The only think thats got me thinkikng 15/43 is too aggressive is how much I end up on the highway while riding around town.
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Old 03-18-2008, 04:58 PM
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I've got 15/41 right now and love it everywhere except the highway. To cruise at 90mph the rpm's stay at 6+. 15/43 might be a bit drastic, IMHO.

And it does hurt top end, no doubt about it. I don't find out very often but I think with 15/41 I'm probably maxing out around 140.
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Old 03-18-2008, 06:00 PM
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IIRC in stock form the SH has a higher top speed in 5th not 6th.. So changing sprockets to a certain extent will just make it so that it has the power to reach full speed in 6th.
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Old 03-19-2008, 10:51 AM
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Well if top speed is important, try a 16/39 combination with NOS.
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Old 03-19-2008, 10:59 AM
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Or you can always just throw a turbo on the sucka.
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Old 03-21-2008, 05:30 AM
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I was wondering if anyone else had noticed that the bike seems faster in 5th than 6th. I could never tell for sure (didnt want to stare at the gauges to much) but thats what i was thinking.
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Old 03-21-2008, 06:00 AM
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15/41 is a good gearing change. i would go with steel sprockets though. aluminum wears to fast. try dennis kirk you can get a 15t front for 25-30 bucks
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Old 03-21-2008, 08:45 AM
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Originally Posted by HisHawkiness View Post
I was wondering if anyone else had noticed that the bike seems faster in 5th than 6th. I could never tell for sure (didnt want to stare at the gauges to much) but thats what i was thinking.
Faster as in better top speed or better acceleration?
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Old 03-21-2008, 08:48 AM
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Originally Posted by drew_c14 View Post
And it does hurt top end, no doubt about it. I don't find out very often but I think with 15/41 I'm probably maxing out around 140.
I've got a 15/44 setup and have hit 160.
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Old 03-21-2008, 09:41 AM
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Originally Posted by HisHawkiness View Post
I was wondering if anyone else had noticed that the bike seems faster in 5th than 6th. I could never tell for sure (didnt want to stare at the gauges to much) but thats what i was thinking.

With stock gearing that's correct. The bike won't pull to redline in 6th with the stock setup. You don't lose any top end with shorter gearing because now the bike will pull to redline in 6th.
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Old 03-21-2008, 09:45 AM
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So does that mean it might be a tad faster? Or just achieve the same top speed as it would in 5th?
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Old 03-21-2008, 10:00 AM
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Originally Posted by GeMs View Post
So does that mean it might be a tad faster? Or just achieve the same top speed as it would in 5th?
I don't know for certain. It depends on gearing and tire circumference and how well you tuck in, I guess. I have an Excel gearing calculator where you can see top speeds with various gearing combinations if you're interested.
For a street bike, top speed is the thing that least interests me.
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Old 03-21-2008, 11:23 AM
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If I minded top speed, the Superhawk wouldn't be in my garage. I'm more into the neck snapping acceleration. My friends know not to even try to drag me at a light. Even with stock gearing it is plenty quick, but I can't even imagine how 15/43 is going to be once I install.
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Old 03-21-2008, 11:27 AM
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The 15/43 is quick Bro, so start looking for better brakes
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Old 03-21-2008, 11:34 AM
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Already got um. I have the 929 complete front end on already. Got a decent deal on the whole thing so I said why not. I cant wait till its above 50 degrees here.
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Old 03-21-2008, 02:10 PM
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Hows about just adding 1 or 2 teeth to the rear sprocket? It's time for me to buy the old C&S, so I thought maybe 16/42 or 3 in a 520, with steel sprockets. Will I need extra chain?

Almost every sport bike, in my opinion could use a tooth or two on the rear, Ducs usually need at least two. That is money, and not much, well spent. They overgear 'em to help pass the ride-by sound test, and get top speed when operated by a five year old weighing 40 lbs.
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Old 03-21-2008, 06:41 PM
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I have the 520 conversion with 15/43 sprockets and I love this set up. The difference is huge. The bike does not lug if in a higer gear at slower speeds when you wick the throttle open. Pulls great on the highway for passing or just speed runs in 6th gear. Before I had to downshift to 5th or 4th to have any fun. It is a little buzzier on the higway but not enough to make me care. The drive through the first three gears is eye opening after doing the change. On the track it works perfect. Just my 2 cents. Definitely go with steel sprockets. I got 4k out of my vortex and it should have been replaced around 3300. The AFAM I have on now I've gotten about 7k miles and have to replace it soon.
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Old 03-22-2008, 12:44 PM
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I've read that the minimum front sprocket size is 14 teeth, lest wear accelerate.
I worked out the ratios and a 15/41 set is about the same as adding 3 teeth to the rear, stock front(16/44)
I'd rather stick with a stock front (16) and add teeth to the back, and you guys are pushing me towards two teeth! If going as far as 15/43 still gives a streetable bike...

But at what point will I need an extra link on the 520 (definitely) chain I buy. Will the stock axle provide slot to move the wheel forward "2 teeth" given a stock length chain?

I guess bikes may be more overgeared than I even thought. I often see people struggling with very expensive sport bikes, and it's so obvious- the thing is way overgeared. My oh my- two teeth will improve the zip, and make life easier for my clutch.
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Old 03-22-2008, 12:45 PM
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So I'm thinkin': 16/43 ? Oh yes!
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Old 03-22-2008, 12:46 PM
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I run 16/43 and have no problem pulling it up in first (throttle) and second (slight jerk on dee clutch) and i still get good RPMs on the highway. And plenty of pull out of the corners... then again Im no Val rossi either so...
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Old 03-22-2008, 01:13 PM
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"I run 16/43 and have no problem" yeah- that and CARBON FIBER wheels!
Thanks for the advice, yes 16/43 seems right.

And I won't need alonger chain?

When I got my Hawk, I thought it would be a bike with tremendous potential, obviously hobbled by it's mufflers, air-box and gearing. Than I had a bad experience getting the bike jetted, soent about a grand to get a poor running slower bike. Okay, I finally got that taken care of, my local Brothers Honda did a great job of returning the bike to (almost) stock jetting, and dynoed and adjusted and it's great. Okay, I finally got smart and got a Haynes for the Hawk, and it turns out to be an easy bike to work on, unitised and accesible. Okay,I'm not too smart, I should have got the book right away.
Now I'm getting juiced again.
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