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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Chain conversion gone wrong--eating through metal /cgi-bin/YaBB.pl?num=1667584143 Message started by Yazman on 11/04/22 at 10:49:03 |
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Title: Chain conversion gone wrong--eating through metal Post by Yazman on 11/04/22 at 10:49:03 Well I guess I'm glad I didn't go for the 13/50 combo. With the 14/50, the chain is already eating through the bottom of the RYCA footpeg relocation bracket (see pic). Not sure if I should let it eat, try to take it off and fab something (like a recess), or epoxy some ABS plastic. I'm open to all suggestions. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Ruttly on 11/04/22 at 22:02:56 There are two different foot peg brackets from Ryca , one for belt and another for the chain conversion with a cutout for chain clearance in that same area. 8-) |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 04:54:04 0D2A2B2B33265F0 wrote:
Ah figures. I've tried calling RYCA several times, but they don't return my calls. Now that they are some fancy computer software company, they've completely washed their hands of the parts business. The one time I did speak to them, they told me they sold all their parts and designs to another company, but when I tried to contact that company, they were out of business too. Seems like if you need RYCA parts, you're screwed. The chain is cheap (Caltric). I'm half thinking I'll just let it eat it's way to freedom lol |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 07:58:48 Threw the chain while I was riding. Scared me and busted up my new paint job when it snapped. I don't understand why it snapped. It doesn't seem to have wear on it from rubbing the frame. The teeth on the sprockets all look good. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 08:02:33 The only thing I can think of, is that the chain came with two different Master links: One master link had a clip, where you just push it through, put the other plate on and clip it securely. The other master link, was the type where you need the special tool to flatten that rivet. I'm realizing now that the chain plate I have does not fit on the master link that is rivet style. I wonder if I put the chain plate on that head slightly larger holes in that somehow led to the chain busting. Is this chain trash? Or should I just get a new master link? Does the chain snapping indicate I probably did something wrong, or that it is garbage quality? |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 08:22:28 Another hypothesis: When I cut the extra length, I didn't have the pin tool, so I used my angle grinder to cut the link all the way through, and then grind down the pin. It got so hot the pin just slid out. I also noticed a faint grease smell when riding, but I figured it was the new chain. Could I have overheated my o-ring chain, and then it broke a seal and bound up and snapped? EDIT: I'm a moron. I didn't grease the master link when I installed it. I'm guessing this led to excessive heat and/or binding. I wish I wasn't so dumb Also, slack was 7/8, then I adjusted to 1.25" |
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Title: Re: Chain conversion gone wrong--eating through me Post by TheSneeze on 11/05/22 at 08:59:48 The chain and sprockets are definitely a safety item, and it is never a good idea to use "cheap" parts for safety related parts. You got lucky. A chain break while riding can cause you to lose control and crash, which can result in severe injury or death. Get a top quality chain, buy the proper tool, and install it correctly. Or, if you are a risk taker over a few dollars savings, keep doing it the way you have been. It's your life. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 09:52:22 I agree; I have a wife and little kids, I gotta play it safe. I guess I shouldn't be shocked an eBay chain broke after 20 miles. I ordered a JT x-chain and a breaker/rivet press tool set. I should've known when the Caltric sprocket had sharp pieces sticking off from casting. I had to file it down. I'm lucky that chain didn't wrap around the rear axle and lock it up. :o |
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Title: Re: Chain conversion gone wrong--eating through me Post by Ruttly on 11/05/22 at 12:22:37 The recess needs to be 20mm deep and 35mm wide and weld up the opening. The 20 mm cut would begin at the inner plate. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 12:33:20 311617170F1A630 wrote:
Thanks for the specs. This is what I got so far (pic below). Is there any harm in leaving it open? I'm only 150lb, so I can't imagine it'd be a structural issue. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 18:12:12 Took a few hours, but with a combination of angle grinder, Dremel, and sawzall, I got a hole cut out. I have only thin metal to weld in, but there's not much left to box in anyway. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 18:15:46 Not pretty. But hopefully it'll be alright. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/05/22 at 18:57:55 Done! Feels good to do it right (or, as close as I can get). |
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Title: Re: Chain conversion gone wrong--eating through me Post by justin_o_guy2 on 11/06/22 at 03:45:14 IDK what cutting board plastic is EXACTLY, but the white ones are tuff. The one I picked up outta the road served in several places. First thing it did was to get put on the legs of a workbench. But I suspect it would take a fair bit of chain dragging across before it was gone. Depends on how much pressure is involved. IDK what the tool that mushrooms the chain to keep the plate on and orings snug has to be made of. I used a panel cutter with a hammer insert, one I made. And someone holding a hammer for backup. |
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Title: Re: Chain conversion gone wrong--eating through me Post by SpamyToo on 11/06/22 at 14:48:42 As far as the chain, use a masterlink that clips. Make sure to orient the clip so that it is pushing itself on, in the way it travels. Not mounted so that anything it hits will knock off the clip. Rivet masterlinks are a crapshoot if you dont have the right tools. Just stick with the correct size clip one. That chain doesnt look broken, looks like the master just fell out. I dont know what series your running. 520, 525, 530 or what. https://www.amazon.com/Pro-Taper-Chain-Gold-Master-Link/dp/B006B2W8EM/ref=sr_1_3?keywords=520+master+link&qid=1667774880&sr=8-3 |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/06/22 at 16:50:16 JOG, I ordered a 2mm sheet of the stuff chain guides are made of from Amazon. Only $8! I cut and melted it to shape, then JB welded it to the top of the swing arm and bottom of the footpeg bracket. I'm curious to see how it holds up. SpammyToo, I appreciate the advice! Thank you! I wonder if I installed the clip backwards last time. This is a great community we have! :) |
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Title: Re: Chain conversion gone wrong--eating through me Post by justin_o_guy2 on 11/06/22 at 17:56:45 I hope you gave that plastic as much texture as possible. JB weld on that kinda plastic doesn't strike me as a winning combination. Maybe it's gonna work great, I haven't tried it. If you get disappointed, you might check out a white cutting board. The thinner ones seem harder,IDK if that is true, not a scientific observation, YaKnow, JB weld on a Very clean and surface prepped area And a shaped and sized piece of plastic, with some small holes that are opened up wider at the top, so the JB is like a mushroom shape, leave the plastic long enough to heat and curve it so the chain slides up the bend on first contact. You getting a picture? Think it might work? You have already taken steps, play it out. If it doesn't fly,Meh, step back and take another swing. If you have room to build a bracket to clamp down and use a thick enough piece so you can drill a 1/8" hole and a hole wide enough to set rivets and leave plastic proud of the rivets. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Gary_in_NJ on 11/07/22 at 05:08:41 If the chain slack was too tight it will cause too much tension on the chain as the swingarm moves up. I've noticed that chain slack is the limiting factor is swingarm movement on bikes with a chain conversion. The swingarm length and pivot point have been chosen to optimize a belt drive. The chain slack is a fine balance; too tight and it loads up as the swingarm moves up, too loose and it's rubbing on the forward pivot point. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/07/22 at 05:30:23 JOG, good points. I roughed to the plastic and metal to give it some bite. Hopefully it'll hold! Gary, that makes sense. I had 7/8 free play, but that seemed to tight, and I was worried it would stress the transmission shaft. I loosened it to 1.25", and it seemed much better. If anyone has the chain conversion, what's your slack? |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/10/22 at 16:55:05 UPDATE: Got the 14/52 JT sprockets and JT x-chain on. Runs and rides like a champ. The UHMW (Ultra High Molecular Weight Polyethylene) plastic is holding up well. Cutting out the foot peg bracket bottom was a good move. I don't hear any chain rubbing. It accelerates like a rocket, but I'm at 4800RPM @55. I think I'm going to go to a 15/52 set up. I cruise at 55 to work, and it's vibrating quite a bit and is loud at that speed. At any RPM though, it sounds like a 1916 motorcycle, all clicking, clanking, and clacking loudly. I think it's just the high comp piston and hot cam. Sounds like being inside an 1800s sewing factory. As long as it doesn't break, I'm cool with it though. |
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Title: Re: Chain conversion gone wrong--eating through me Post by badwolf on 11/10/22 at 17:37:57 The stock speedo runs off the output shaft of the tranny. When you change the final drive ratio, or rear tire size it throws it off. (worse than it was stock) I went from the stock 2.98 to a 2.60 with a 150/90 15 rear tire and 100 miles on the stock speedo was 123 on a gps! But I'm only turning 3400 at 60 mph. Check yours aginst a gps app on your phone. Speedhut makes some great gps speedos, not cheap, but I love mine. (cept when I go thru a tunnel ) 15-52 is 3.46, still lower than stock 2.98. Faster takeoffs, but a lot of revs at highway speeds. Stock with 2.98 turns about 4100 at 60 mph. |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/10/22 at 18:48:18 Thanks! My speedo is an electronic one I calibrated using a GPS. I also want to go to a 15/52 because, as I understand it, it will help the chain last longer (same tooth-chain position F&R sprocket every 780 chain revolutions vs every 52 for the 14t). Plus the extra gas mileage and clearance for the swingarm. I'm at 3.71 (my rear is 130/70R18 though, a little taller than stock). Hopefully 3.47 will be a sweet spot! |
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Title: Re: Chain conversion gone wrong--eating through me Post by badwolf on 11/10/22 at 19:29:25 Check your rpm at 55 with your final drive, rear tire combo. Fewer revs means less vibration and better mileage. With 4th gear so close to 5th on these bikes it can be a great passing gear, leaving 5th to be used as a overdrive highway gear. Mine is about 3200 at 55 and I can see with my mirrors. If I need quick power I just drop to 4th. ( 4th and 5th are both overdrive gears if you look at the ratios, hey the bike is a thumper after all.) |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/11/22 at 09:51:15 badwolf, that's another good point--my mirrors shake like a junkie at 55 right now. I just hope I don't end up going down to the same gear ratio as I had with the belt, in which case, I could've just saved a lot of time and money just leaving it stock! I really wish they'd make a smaller front pulley/larger rear pulley. Maybe I could get one CNC machine. Seems cost prohibitive though |
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Title: Re: Chain conversion gone wrong--eating through me Post by Yazman on 11/13/22 at 17:17:55 Update: 15/52 seems perfect; no chain rubbing, smooth at 55, accelerates like a missile. I took a 38F ride today and was loving it! No more vibrating like a bed at a cheap motel. |
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