20-03-13, 05:29 PM
(19-03-13, 11:56 PM)Yamazer-92 link Wrote: My mate recently sold his bandit 600 for £1100 and bought a 1989 GSX R 750 slingshot for £1000. Personally, I'm not so sure it was a good idea because that seemed a lot to me for a bike that age, plus it has no MOT or tax and has been sat around for 5 years. He likes sport bikes and got a bit bored of his bandit even though it was a good runner and a lot newer on an 03 plate. Anyway allegedly the carbs have been sorted on the gsxr and it was stored without fuel etc so thats all fine, the main problems are the brakes and oil drain bolt.
The bike failed its mot last week for having excessively binding brakes. He's fitted a new master cylinder which then made the brake lines fail and leak a lot of fluid from the banjo bolts. So he's now fitted new braided brake hoses and said a mate has checked the calipers and cleaned them thoroughly etc. They arent leaking fluid anymore but are still binding quite badly, the discs aren't that worn but could possibly be warped? Not all the bobbins are as free as they could be. The wheel bearings seem okay, we're going to take the wheel off tomorrow and check / grease the spindle and give the calipers another clean to try and free them up.
Also today he tried to drain the oil but couldn't undo the drain plug on his own so asked if I would undo it whilst he held the bike. When I tried it was just spinning round and round, felt at times finger loose then quite tight, just spinning round in circles. :\ It definitely wasn't undoing anyway, and he isnt sure what to do now, is it an engine out job? I think personally he's rushed into this buy a bit and is having doubts. It looks nice and it runs, sounds impressive but needs a few expensive parts like chain and sprockets etc.
Anyway, any advice with the oil drain bolt and brakes would be appreciated. Thanks.
The brakes:
If they're still binding, there's really two possibilities.
If the master cylinder and lines are new and good, then either the calipers are in need of a proper strip down (pistons out, clean up, new seals and pistons in jobbie), or the discs are extremely warped and are causing too much drag. To be honest on a bike that's been sat for 5 years its likely the seals have given up the ghost, so i'd sort out a new set.
Oil drain bolt: Sounds like he's stripped the thread, or possibly the bike had a helicoil fitted which has given up the ghost. What you need to do is carrying on undoing the bolt, but you need to get downwards pressure on it to make it come out - maybe a thin chisel lightly tapped in might help it start coming down, and then you can carry on using the chisel as leverage to push the bolt down as you undo it. Once it's out, it'll probably just need a helicoil fitted, just check the size, order up a new one and get it fitted.
Personally though, there's no way I'd have paid that for a 1989 bike. For a couple hundred more (and I do mean literally a couple hundred) he could've got himself an S-RAD 750 for sure, maybe even a K1-K3 if he was lucky, and they are literally light years apart from a slingshot!