I had a new set of tyres fitted the other week and the bike just felt like it was running 'wrong' afterwards. It needed more throttle to get going and it slowed down really quickly when I came off the throttle. I was sure it must be a brake dragging, or maybe something with the exhaust valve! :Nailbiting: ... and then I realised what it was... ... the new tyre has a larger diameter than the old worn one and so the chain was stretched really tight ... 3 mins to adjust the chain and it was all cured! :Banghead: :Banghead: :Banghead:
The hub moved when the wheel nut was being undone / done up!!! Or someone undid the wrong thing.:Banghead: Just think of the damage to the final gear box drive bearings
Might be the pressure on the wheel nut I guess but I'm sure the tyre fitters didn't undo the wrong thing? Maybe the increase in ride height might have made the chain tighter? Actually the more I think about the more confused I am, anyway at least it was only a tight chain!
Markymark is right....the only way the chain got tighter is the reasons I gave...someone loosened the hub (or it was already loose). Now you've adjusted the chain it's (hub) has been done back up 1-2-1 style to the correct torque?
Don't know the answer or the maths. But...if you have a taller profile, which therefore raises the height. Of the back, wont this have an affect on the angel and possibly tightness of the chain on a single swinger?
oh dear it is a sharp day today...will the suspension be running through a different arc then with the new tyre? pass the ammer...
You may be considering gravity and the rear shock as euclidean vectors and I think your right, if you jack the back of the bike up, it will effectively shift the weight forward which will slacken the chain, but the effect will be minuscule, too small to be noticeable. I am on my 3rd set of tyres, it takes quite a bit of force to loosen the rear wheel nut but it has never shifted the wheel round in the hub. Perhaps the OP went to "Micheldever Tyres" because the fitters there are complete muppets
When my bike is on its centre stand so the wheel is hanging, the chain is tight. Go figure. Communication skills are what is understood, not what is said. But then all good communicators know that, right..
You need to adjust your chain. The chain gets tighter when you take it off the centre stand and put it on the side stand so you need to slacken it off a bit
the bottom line is if the OP chain was fine before a new tyre then wrong after a new tyre some one has undone and altered his chain during the tyre changing process.....the tyre change alone will not effect the chain tension from what it was before.....
Because exhaust has to be removed, has something happened/misaligned/pinched in relation to the exhaust valve?
Nope, exhaust valve is fine, as I said it was all down to a tight chain. Don't know how or why but I've never had an issue in the past at FWR tyre fitters...
