Bloody hell!! Same as happened to the fella I knew then but his wasnt in a race but at pre-season in cartagena. These sound downright dangerous then Hope your son is OK
Hi Souleh, Thanks My son was lucky,we managed to put the old adjusters in for qualifying and racing Sunday ,had a 2nd. It was this forum that had me thinking ,was it you who posted the bit about someone coming off? We were bemused as to why the chain came off,we check everything meticulously,no slackness before going outof paddock. One of the racers behind my son posted a video on youtube and I watched it and because he came so close I could stop it and see that the chain adjuster knob was missing when he had stopped because of no drive. That meant that it had come off on the start.I heard a double "clunk"at the start when he put it into gear for the lights and thought he`d missed the gear but he said no.. So thinking about it it was probably the nut shearing and the second "clunk"was the wheel twisting and jamming on an angle in the swinging arm. We are back to good old Honda originals and that`s where we`ll stay.Will not be able to trust any type/make of the same design after this. He has only done 4 meetings ,about 10 sessions in all including races. They look the part but there is no metal thickness to take the forces,especially racing.
Yeah the fella I knew had them fitted and his sheered off on a straight and the whole back end sunk and nearly seized up. His chain came off like yours but only wrapped around the wheel so he could freewheel it back to pits. Very scared to think if it locked up or twisted like yours, he would have been thrown off for sure. His was fitted to a gsxr but id not fit them to a 125 nevermind any 1000cc bike. They look pretty and the design isnt too bad but the bolt material is just not fit to take the stress the chain gives it
Glad to hear your son escaped serious injury. Those pictures are shocking, the design looks similar to the lighttechs but hopefully the part that sheared is more unsubstantial using higher grade materials. Seen similar failures on the older designs of the Gilles adjusters. I use lighttechs but only on the road and the odd track day so not nearly stressing it as much as the race boys but still a little concerned, my question is should not the axle bolt prevent fore/aft movement?
Hi, Thanks Due to the stress and no bolt to stop the adjuster moving when that drive goes on it has to move,That`s why we are going back to the conventional way where the adjuster bolt comes out of the s/arm and helps stop inertia ,the axle cannot move forward. The torque setting used is factory specified so there was no difference there.The engine is pushing out close to 170 bhp. That`s a lot for a "free" axle to take without moving. Speaking to other people recently ref this problem,other makes with the same type of design have had similar outcomes. I can`t name them because I have no experience of the other makes,but Mad Moto ,well that`s different. Don`t risk them especially on a track bike.
I have seen similar issues posted online with the Gilles items. I have no personal experience but accounts sound similar.
Seen 2 more pics of the same type of thing. By all accounts Gilles arent great either. Ive seen problems with their rearsets before (bolts made of cheese) so im not surprised.
Shouldn't the main stress be taken by a properly torqued wheel nut? I'd not expect any bolt that diameter to hold a great deal of compression. Especially since there's nothing to hold the when from running backwards... e.g. under braking. H
I was looking at these the other day and will avoid like the plague. I did check the selllers feedback and a few people have taken orders and posted that they fit gerat and look the part. Hope they don't find out the hard way. I am interested in the question above regarding the axle bolt taking the majority of the load over a chain adjuster bolt. I understand that standard adjusters have the wheel forced towards them and this style have to withstand a pulling force under acceleration. Thanks for the warning.
Yeah I don't agree with anything I've read on here. The Truth is You could Plastic Chain Adjusters made by Mattel on your bike, because the chain adjusters should Never feel any torque or sideload or Any pressure as long as your AXLE Nut is Torqued. Someone did not Torque/TIghten their Axle nut. Don't blame the Chain Adjusters, they maybe cheap but they didn't cause any of that. The only time they feel any pressure or torque is when the Axle Nut is Loose and you are "Adjusting the Chain" Save yourself some Money Buy the Cheap Ones that Look Good, and TIGHTEN THE AXLE NUT.
Once the axle bolt is torqued correctly the adjuster might as well not be there! It's only that, AN ADJUSTER.. it's job is not to be a stressed part. Some numpty didn't torque the nut correctly.
To everyone above that's said its the axle nut that's not been tightened properly,take your adjuster bolt out and go for a proper thrash,we'll soon have less people spouting rubbish on the forum
