Yamaha tdr 125 year 1994, electric scheme - 2004 Yamaha DT 125 R

SOURCE: When is cylinder honing required?

What is the compression on your scoot?
Honing is for small imperfections.If you can run your finger nail over Imperfection and it clicks or hangs up you need a BORE job..Honing is for very small issues. Seconhand parts also must be inspected and checked for wear.Mic the cylinder for proper specs. Please get back at me and Ill try to be of further service.

SOURCE: How can I fully derestrict a 2008 TDR 125. Bike

Hi,

I suggest to check wether the carburator has a restriction in the holder
check if the clapets (between carb and cilincer) has a restriction
check if the exhaust has a restriction.

But overall: a race-exhaust, a tecnician who personalizes the carb to the local wether conditions by adjusting the jet, an eventually needed unrestriced cdi will improve bigtime.

greetings from a big 2s fan.

Olivier.

SOURCE: I need an owners manual for a Yamaha TDR 125 Do

If you want a service manual you can download a free one at
http://www.yamaha-motor-europe.com/community/service/manuals.jsp
Good luck!

SOURCE: head bolts tourque settings yamaha dtr 125

cylinder head nuts = 16 lbf ft - 2.2 kgf m cylinder barrel nuts = 20 lbf ft - 2.8 kgf m
please vote

SOURCE: need free download service manual for yamaha tdr

http://www.yamahaownershandbook.com.au/index.php

Try this link, Enter: Motorcycle: Model: Year....it has free downloads for most Yammy's, includes adobe reader.
Cheers.