2003 RM 125 Rebuild

[NDECNT]

After a little advice here if anyone can help.
I brought a 2003 RM 125 a little while back. Have probably done around 6-8 hours on it all up.
Have decided im going to get it rebuilt as im not sure when it was last done.
It is becomming a bit harder to start and has also developed a odd noise which sounds mechanical ( i know this could be anything, sound like rattling metal almost ).
Anyway I have a friend who has built a few bikes who is going to do it for me.
What id like to know is what parts to get?
THere seems to be ALOT of options/brands around. Forged/Cast etc etc....... which is best. Dont want to COMPLETELY skimp and get cheap rubbish but dont need the most expensive parts either.
A friend has advised it may be the reeds making the noise? who knows. I guess it can all be checked when its apart.
Any advice would be very much appreciated.

[cambocambo]

I have rebuilt a couple of bikes, my kx125 and i rebuilt the top end with genuine Kawasaki parts and no issues. I have also rebuilt my brothers RM125 bottom and top end with cheaper motox parts and havent had any issues, both bikes are about 10 hours into the new parts. both pistons were not forged just cast.

any ideas how many hours the bike has done total?

[SpikedPunch]

This is the thread for you:
http://www.kiwibiker.co.nz/forums/showthread.php/122571-Rebuild-friday-night-date-Anyone-keen

[honda_power]

dont get a mikita piston... my rm125 took a nice chunk out of it 2-3 hours in. I run wisecos in all my bikes, as long as you warm the bike up before screaming off they are good. Wisecos are forged. If the bike is flat on the bottom the reeds are prob toast.

[cheese]

IMO, go factory, wiseco or pro-x. Barty5 is doing a rebuild night. Save some money DIY!! Just do the reeds while you are at it. they aren't overly expensive.

[barty5]

piston kit pro x $180 gaskets $40 little end $18 + fr8 wiseco would cost more

[NDECNT]

http://www.motoxparts.co.nz/motoxspares.php?category=99&brand=107&page=1&piece=1293

I have been thinking of using that kit - $149.00
The prices are at the bottom of the page. THen I understand I also need a gasket kit which is $49.95.....do I need the small end bearing aswell?

Any pros or cons to this brand that anyone knows of?
Im also struggling to find new reed? Are factory ones the best to use?
Thanks for all the advice so far :yes:

[noobi]

Wossner pistons are just as good as the other brands mentioned in this thread, they are forged like wiseco but offer A,B,C spec sizes like cast pistons.
I believe that the athena pistons are just wossner in a different box.

But if you do go with the wossner, make sure its the same shape as the piston thats already in your bike, strange I know, but I bought one and it was a domed piston, where my bike runs flat top pistons.

You may as well get a small end bearing aswell, just for peace of mind, they can wear out.
Reeds, if you have aftermarket reeds now, then youll need to replace with the same, but if you still have the stock reeds, then just call up a Suzuki shop and ask for some, I recommend MR Motorcycles, very good customer service, and they will send them to you if you cant go and get them.
You need to read what is written on the reed cage, if there is something to read, to see if you have stock or aftermarket reeds. But if you call a shop they would be able to sort you out with any parts you needed.

[NDECNT]

Thanks for that! Good to know, was about to just buy one off the site. Better check!

[NDECNT]

Hey guys,
ANother quickie....
I have brought a new rear sproket for my bike (03 RM 125)
Its a renthal ultralite 123U-520-51GYSI
Id like to get a new front chain wheel and a new chain as well. There seems to be LOTS of options out there. Any suggestions on which best to suit the rear sprocket I have brought.
Thanks
TIm

[LittleJohn]

I notice it says you are on the shore, would suggest going in and talking to Spectrum, they can get in full rebuild kits, and other parts. But you can just go talk to them and then see what you need, from there shop around. Cycletreads and the Suzuki shop down barrys point road are alright as well. Or as Barty has said above he can get the parts.
I have always used Pro X pistons without any problems.

As for your sprocket and chain, there are a lot of choices. Personally I just use standard sprockets (alloy on my 250) and DID chains. My 250 is running an o-ring chain but my 125 is running a standard DID race chain (non-oring). You can also get x-ring chains at a good price. If you have really good sprockets you should get a decent chain, that way you will not wreck one or the other. The guys at Spectrum or Scott off here (Mr Motorcycles) will be able to go through the different options.

As for rebuilding your bike, the top end is easy as, would suggest that if your mate is doing it you tag along as you will probable find you can do it yourself after seeing it once.

[NDECNT]

Thanks for that mate, I am definatly planning to sit in on the rebuild for some learning.

Have done some research on the different sorts of chains but still a but confused haha, Scott maybe you could PM me with my prices and options for a front sprocket and chain? Or just post on here, im sure there are others who may be interested as well.

Cheers!