motRocks

Ok guys. Sorry but I haven't uploaded to pics yet but will. Loosened everything off (front brakes, rear brakes). Dropped wheel off again. Hub out, applied some brake cleaner. Sanded down the inner brake drum as there was a LITTLE burr. Cleaning should up a large crack in the brake drum. It's about a half inch long and quarter inch wide. I think the wheel hub is foo bar. Cleaned all back up. Left brake off slacked and turned wheel. When looking now I can clearly see the REAR brake snagging and moving as the wheel turns. It's more pronounced when in gear and turning. Is this a common occurance? The REAR wheel is SUPPOSED to be relatively new so I've no idea why this would fail. How much is a replacement wheel going to be? Tyre is fine, rear brake seems fine and there's plenty on the pads. I also found that the front caliper is seizing up. Any ideas on this? Thanks again lads and I will try get the pics off my phone.

No. I haven't checked. I'm thinking I may need to adjust the brake tensioner too. I also noticed that one of the springs in the rear drum brake looked a little stressed. ie overworked. Are these hard to come by or would any motor factors have them. Actually how would you re-FIT these springs. Looks like a pig of a job. Actually forgetting to put back on the chain after cleaning brakes makes it such longer job. ;-)

OK. Had a chance today to have a look. Popped off back wheel, took out brake drum. Yes the brake cam was a little stiff but ok. There wasn't much dirt there. A spacer popped out and I'm assuming that goes between frame and brake drum. Tightened chain while checking for snagging ever 15 or so links. Felt great. Tightened up rear bolt. When I tried to move backwheel with engine running it got tight again. Rear wheel is tighening up when I lock the rear wheel bolt. Should I be tighenting the rear (wheel) bolt with the machine on the ground? I ask as I think there is less slack in the chain once the bike is on the ground, (not jacked/supported). Checked the rubbers while wheel was off and everything looked ok. I think it still chain tension honestly.

no. wheel locks up. Good question!! I'm assuming the last time is was in the shop for work. That would be last Sept '09. Have 10w40 to put in it tommorrow. No. It could be the brakes. I am wondering how the brake torque arm works. Will be popping it off tomorrow for a check. Thanks again lads for all the prompt replies and useful questions. I should have added that I have worked on a few bikes and cars in the past and have a load of tools. Currently own '81 VESPA PX 125, DNA 01 50cc and got them going from weather siezed engines. Great fun!!!!

It will a little. Maybe nearly one rotation, then locks up. There was slack in the brake cable. Do I need to adjust the torque arm for the rear brake. Doesn't look like there's much adjusting in it. Thanks again folks.

Thanks for the quick post. Adjusting:-- Looosened the back axel wheel nuts. Opened up the lock nut. Adjusted inner nut. Checked wheel was aligned, then tightened up lock nut again. Tightened the axel nut up. Wheel /chain turned fine BEFORE tightening up the axel nut. Related? Followed instructions as per user manual. 6-26 page. from yamaha uk site. GREAT SITE!!! Thanks again. Mot

Hi guys. Newbie here to the site. Great site lads. Downloaded the service manual. Sorted lots of questions. But I still have a problem. I just adjusted the chain as it was slack. Now there is a bit of play, 3cm from top to bottom. Bike starts great, but when I engage 1st or 2nd, the bike moves for few inches then teh back wheel locks up. It moves even less in 2nd gear. The rear brakes where serviced a few months ago and are still ok! The oil is near min, but not out. Any ideas what could be the problem. It's my mates bike and he's selling it so I said I'd service it. I know in the past he's had the chain, sprockets, clutch and regulator, and a set of sissy bars (thieves broke into) changed. He hasn't rode it in a few weeks as the loose chain was causing driving problems. Have I tightened the chain to much? Clutch plates stuck? I could turn the wheel no problems BEFORE I tightened up the back wheel so kinda think this is related. Sorry if this has been covered somewhere but I searched and nothing came back. Hoping to catch some of you before you head home from work. Thanks in advance lads. Mot (Dublin, Ireland)