| | | Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles | Need some input Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. Ok guys here we go. finished my 1st build yesterday. took her out this morning, no problem. took it out ...  | | 
06-26-2009, 10:11 PM
| | Motorized Bicycle Member | | Join Date: Jun 2009 Location: Minnesota
Posts: 29
| | Need some input Ok guys here we go. finished my 1st build yesterday. took her out this morning, no problem. took it out just this afternoon, the chain idler pulled in when I engaged the engine (I have it as tight as I can get it on the tube) and the chain jumped to the inside of the sprocket and snapped off my master link...thank god that's all that happened. is this idler worth the risk or is it advantageous to fab one that goes between the two bars supporting the back of the bike. I just don't like the way this idler pulled into the tire like it did. I thought the chain was straight as I had no problems this morning. I am looking for thoughts of those who are more experienced than I at this. Thanks guys | 
06-26-2009, 10:23 PM
|  | Motorized Bicycle Elite Member | | Join Date: Oct 2008 Location: Urbandale Ia
Posts: 497
| | Re: Need some input The universal bracket that the idler is on is a joke, since most chain stays will be a different diameter. Most people drill and tap a small screw through the idler bracket. Myself I have never used one of the kit idlers. I machine my own bracket and idler.
John | 
06-26-2009, 10:27 PM
|  | Moderator | | Join Date: Mar 2008 Location: Cuk Ṣon, AZ
Posts: 4,724
| | Re: Need some input Most of us who run the tensioner will use a small sheet metal screw or something to keep the tensioner from twisting.
You can run without the tensioner but I like to use mine. | 
06-26-2009, 10:43 PM
| | Motorized Bicycle Member | | Join Date: Jun 2009 Location: Minnesota
Posts: 29
| | Re: Need some input When I felt that chain jump, I thought the pooch had been screwed. thank god only the link busted. Is running the idler closer to the sprocket an ideal placement or in the middle somewhere? I saw on here one of the guys gave instructions how to make an idler that looked pretty good, was gonna give it a try but I lost the link to the instructions for it. | 
06-26-2009, 11:00 PM
| | Motorized Bicycle Newbie | | Join Date: Jun 2009 Location: san miguel
Posts: 11
| | Re: Need some input use high temp gasket material it is suprising but when compressed between the idler and frame that tesioner will not move shaka | 
06-26-2009, 11:03 PM
| | Motorized Bicycle Member | | Join Date: Jun 2009 Location: Minnesota
Posts: 29
| | Re: Need some input I may give that a shot. Can i get another master link for the 415 chain at TSC or will I have to go to a small engine shop? | 
06-26-2009, 11:25 PM
| | Motorized Bicycle Newbie | | Join Date: Jun 2009 Location: san miguel
Posts: 11
| | Re: Need some input you can get masterlinks at napa better yet get a chain break shaka | 
06-26-2009, 11:29 PM
| | Motorized Bicycle Senior Member | | Join Date: May 2009 Location: jensen
Posts: 92
| | Re: Need some input thats a good question and i think i may have an answer i went to ace hardware and foun a 415 master link for 2.00 i think most of your hardware shops should have them but not home depot or lowes hope i could help maybe try gasbike.net there the cheapest i know of thats where i buy all my parts good shipping also real fast they ship the next day good luck have fun
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06-27-2009, 12:56 AM
|  | Motorized Bicycle Elite Member | | Join Date: Aug 2008 Location: Tucson, AZ USA
Posts: 705
| | Re: Need some input If your local Ace doesn't have them you can always order them from most of the numerous online dealers. Dax carries them and they are good people to deal with. You can also use #41 Roller chain if you find a supplier nearby.
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06-27-2009, 06:11 AM
| | Motorized Bicycle Member | | Join Date: Jun 2009 Location: Minnesota
Posts: 29
| | Re: Need some input I will try Napa and ACE. the Hank across the street doesn't carry this chain, course I live in the town time forgot too. A chain breaker would be NICE. so much easier than grinding the pins off and popping with a hammer. | | Thread Tools | | | | Display Modes | Linear Mode |
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