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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Chain conversion and chain length /cgi-bin/YaBB.pl?num=1327331741 Message started by runrun on 01/23/12 at 07:15:40 |
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Title: Chain conversion and chain length Post by runrun on 01/23/12 at 07:15:40 I'm about to convert my Ryca to chain drive. I'll be experimenting with different rear sprockets but will use an 18 front for best swingarm clearance. My plan is to start with a relatively large rear sprocket, and decrease rear sprocket size til I get the gearing that I want. My question is about chain length. If I start with a 49 rear, would I be able to go down to a few teeth on the back without removing chain links? If I start with the chain adjusters most of the way in/short, maybe I'll be able to compensate for smaller rear sprockets just by moving the adjusters out/longer? |
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Title: Re: Chain conversion and chain length Post by justin_o_guy2 on 01/23/12 at 07:30:05 Check the tech section. This has been well documented. Hutch pioneered it & some other guy jumped in at the same time. You can get close with a tape measure & a pencil & paper & buy long & cut to fit, too. Id sure buy the cheapest chain I couldfind till I was sure I had the sprocket sizes all sorted out to suit me, |
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Title: Re: Chain conversion and chain length Post by MotoBuddha on 01/23/12 at 11:10:48 I have an 18/49 setup. I bought a 120 link chain and cut off what I didn't need. This is the piece that's left over. http://i280.photobucket.com/albums/kk182/motobuddha/cf63db0b.jpg |
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Title: Re: Chain conversion and chain length Post by runrun on 01/25/12 at 07:15:23 Thanks MotoBuddah, I'll be putting your sprocket spacer washers to use soon. Is that a 530 or 520 chain? Also, please remind me if you had any front sprocket cover clearance issues using an 18 front. Hutch's original chain conversion thread said that an 18 would not have enough clearance. |
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Title: Re: Chain conversion and chain length Post by MotoBuddha on 01/25/12 at 11:14:13 http://i280.photobucket.com/albums/kk182/motobuddha/1f0b7576.jpg 530 chain. Plenty of clearance with an 18T sprocket. |
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Title: Re: Chain conversion and chain length Post by runrun on 01/25/12 at 11:17:41 Thanks. Your pictures are really helpful. |
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Title: Re: Chain conversion and chain length Post by Savage_Rob on 01/25/12 at 12:16:26 I find the chain conversion interesting. What advantages do y'all see in using chain instead of belt (aside from aesthetics)? |
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Title: Re: Chain conversion and chain length Post by SurfJunkie on 01/25/12 at 15:39:17 7341564147457F724F42200 wrote:
The fact that you can re-gear to whatever you want is likely the #1. |
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Title: Re: Chain conversion and chain length Post by justin_o_guy2 on 01/25/12 at 17:05:44 4D6F746F427564646861000 wrote:
Im hoping you havent decided exactly what to do yet & thats why the washer isnt bent over. |
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Title: Re: Chain conversion and chain length Post by MotoBuddha on 01/25/12 at 17:53:37 5C4345425F5869596951434F04360 wrote:
Im hoping you havent decided exactly what to do yet & thats why the washer isnt bent over. [/quote] I did a quick test fit for that shot. What you don't see is the chain held to the rear sprocket with zip ties. Rest assured that since then the washer has been bent over (and the chain connected with a master link, and the chain properly tightened and the rear axle aligned). ;) |
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Title: Re: Chain conversion and chain length Post by justin_o_guy2 on 01/25/12 at 17:57:44 Whats up with that nut on the front sprocket? Thats not the stock one is it? Looks like thers a tin inset with a blade that binds into the last thread to make it a lock nut.. |
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Title: Re: Chain conversion and chain length Post by MotoBuddha on 01/25/12 at 19:21:25 All I know is that it was on the bike when I got it, and it works. |
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Title: Re: Chain conversion and chain length Post by baker87 on 01/26/12 at 19:44:04 whats a good gearing combo for gas mileage on a 5 speed bike that lost 5th gear? |
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Title: Re: Chain conversion and chain length Post by 2whlthrpy on 01/27/12 at 08:37:11 In regards to the question of advantages....it may be that its cheaper to convert to chain than buy a new belt? :-? If that is your problem of course. |
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Title: Re: Chain conversion and chain length Post by MotoBuddha on 01/27/12 at 09:23:46 4C4F454B5C16192E0 wrote:
It depends on what trade-offs you want to make. The closer the front and rear sprockets are to the same size (hell, you could even go with a rear that's smaller than the front) the better your mileage. That's because the engine needs to turn fewer times to get the rear wheel to turn the same speed. Besides dropping fuel consumption per mile, you can also either cruise at a given speed at lower RPM, or cruise faster at the same RPM. But if you make the sprockets too close together in size, your acceleration starts to suffer, because the mechanical advantage the engine has starts to decrease. Over in the technical section, on another thread about chain conversion, there's a graph of various gear ratios, including the stock one. |
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Title: Re: Chain conversion and chain length Post by Oldfeller on 01/27/12 at 11:15:07 Any of the gear ratios mentioned in the thread effectively puts you back in the 5th gear pre-loss ball park. 5th gear really isn't a big change anyway. If you want to work on your 5th gear shifter problem without splitting your cases, take off the front sprocket cover on your bike and look at what's there. There is a little bitty "you can get to it" shifter sprag gearbox that might just possibly have a solution to your problem, in concert with a mis-adjusted shift rod that is. Once you have taken it apart, cleaned it and re-greased it and understood it (and also manually checked all your shifter drum positions to see what's up inside the gear case if that is indeed your problem) then you should be ready to do whatever it is you are gonna do. Note: you have to take this cover off to put on your front sprocket anyway, so it is no loss of effort to do the sprag box check. |
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Title: Re: Chain conversion and chain length Post by teabowl13 on 02/11/12 at 07:41:29 784A5D4A4C4E747944492B0 wrote:
The guy who's doing my chain conversion does a lot of chain conversions on belt drive Harley's (for 10 years now). He swears that there is a significant horsepower gain from any chain conversion; 10% I think he said? But don't quote me on that, I may be mis-remembering. I'm pretty sure it has to do with the softness and stretch of the belt; the chain gives a much snappier throttle response, but I haven't ridden a Savage both ways, so I can't actually say from personal experience yet... |
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Title: Re: Chain conversion and chain length Post by runrun on 02/11/12 at 20:53:53 153334200C33282D2F23460 wrote:
The fact that you can re-gear to whatever you want is likely the #1.[/quote] Within limits, this is true. Keep in mind that because of chain/swingarm clearance issues, you'll probably not be able to go below an 18 tooth front unless you significantly reprofile the swingarm's left front section, around the top half of the swingarm pivot. To accommodate bigger rear sprockets, you may be able to make room using the rear axle adjustments, but also you'll need to take into account different chain lengths. |
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Title: Re: Chain conversion and chain length Post by teabowl13 on 02/12/12 at 06:07:39 From what I have read, the only clearance issues with the front sprocket have been for those of us doing RYCA conversions or otherwise using much taller rear shocks (12"-13") which changes the swingarm angle significantly. If you go through the original chain conversion thread, which was written for a stock Savage, you'll see here is a whole list of possible sprocket size options and what the gearing changes are compared to the stock belt set-up. |
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Title: Re: Chain conversion and chain length Post by il67bp on 02/15/12 at 10:03:11 Well after all this time I've finally gotten to the point where I'm ready to order my chain.. I have ordered a 13f-43r.. When the money is right the frame is getting sent to get a hardtail.. Does anyone have a suggestion for chain length with the 13f 43r and 4" of stretch in the rear? Is there any simple equation to figure this out? Or do I have to wait for the frame to be made to measure it |
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Title: Re: Chain conversion and chain length Post by Tehrifleman on 02/20/12 at 00:05:06 I'll never have a chain again. After my first belt drive, I was done with cleaning chain, greasing chain, and washing chain grease off of other parts forever. ;D |
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Title: Re: Chain conversion and chain length Post by Cavi Mike on 04/12/12 at 12:54:49 Where did you get the sprockets? |
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Title: Re: Chain conversion and chain length Post by mpescatori on 04/13/12 at 01:47:18 3F3A60613426560 wrote:
:-? The OEM belt final drive ratio is roughly 3:1; with your 13:43 you stand at 3.3:1 In other words, your new final drive ratio is 10% shorter than the already short OEM 3:1. This means you will accellerate faster from a standstill but cruise at a 10% lower speed at the same rpm. Are you sure that's what you wanted ? ::) |
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Title: Re: Chain conversion and chain length Post by runrun on 04/13/12 at 05:46:04 684A5D426642404E2B0 wrote:
google "jt sprockets" |
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