qwin456

Anyone know if the 2001< rear brake calliper will fit onto my 2000 swing arm without any mods ? cheers

I have not changed anything on the bike for a while, just happened out the blue today. I was riding around a flat field, popping wheelies then the back brake locked up, i had a look and the pads where glowing red hot and the brake pedal wouldn't move. I let it cool down and the pedal came back to life, took the pads out and they were badly warped. got home took the calliper apart and the seals have melted. I suspect what has happened is that the brake must have been ever so slightly binding, super heated the pads/calliper and the pistons expanded and seized. but why it happened i have no idea ? yeah i am in west Sussex. cheers

Hello. I was out on my 2000 315r today and the back wheel suddenly locked up, stopped and looked and the rear disc guard was on fire! After some swearing at and stamping on the fire i had a look and the brake had seized, everything was red hot and all plastic parts had melted =( so.. I have taken the brake apart and need to replace seals and pistons but i seem to have 31mm pistons and all i can find is 32mm, anyone with know where i can get them from ? secondly, any idea why it happened in the first place ? Thanks Chris

Thank you for the replies, its been very useful, I think the damage on the piston/cylinder was just to the side of the inlet, the Air filter was shagged and the drain pipe was missing so the air box itself had a layer or mud and ***** inside! which I'm sure didn't help. I have been busy this week so not got much done on the 315. I have sent the shock off to Brooks Suspension to have it refurbished, so without the cylinder or shock i cant really start building the bike back up. It has given me time to look over the bike properly and start fixing a few things. Forks have been striped, cleaned and rebuilt, All new bearings for steering stem, linkage, swing arm and wheels ( they where all shagged!) and i gave the carb a good clean. I have got a load of questions about the Montesa so i thought i'd just list them and if anyone can help me out it would be greatly appreciated! but if you can't be a***d no problem : Cleaning the carb I have noticed that i don't seem to have standard jetting, i have 120 main, 44 slow? common jetting ? also it seems that i should have an air vent hose attached to either side of the carb but mine is missing, it looks like it connect to the air sub assembly but all the tubes are missing now =( As the bike has been so neglected i don't trust anything so would like to flush out the old oil completely, What is the best way to do this ? best gear box oil? i know the elf stuff is recommended but i cant get it locally and it costs a fortune, any decent alternatives? There are two wires with bullet connectors under the tank that don't seem to be used, Any ideas what they are for ? Thank you in advance! Chris Xx

Hello all! First time on the forum so i thought i'd say hello and see if i can get a little advise. I have been riding Jap sports bikes for ages and a few weeks ago i had a go on a mates trials bike and have got the bug! since then i have done a few rides with borrowed bikes any loved it so i got myself a 2001 Montesa 315-r. it was cheap but in a real bad state: filthy, suspenion needed refurb, fudged air filter, carb full of spooge..ect ect. I took the head off and some oily carbon but didnt look to bad, decided to take the cylinder off and found that the piston was badly scracthed and the bottom piston ring had beed destroyed, the cylinder had some light scoring so i have sent it off to langcourt to get it sorted. What is the likely cause of this ? I checked the crank and there is no free play, main bearings seem to be ok but i only know that there is no movement on the flywheel and they feel smooth. cleaned out clutch slave, clutch looks good and fitted a new water pump seal kit. When i emptyed the oil is was a sludgy grey mess? i have only ever seen milky white oil from getting water in it. having never owned/worked on a 2 stroke the engine is a bit of a mystery to me. I have done a lot of googling and reaserch so know some of the basic but i would really appreicate any tips or advise is setting up and maintaing the bike. Many regards Chris