Top 20 2007 Yamaha DT 125 X Questions & Answers

have you checked the valve gap if the valves are open this will cause low compresion if not there may be a crack in the head or cylinder but not to clever with bikes sorry

Drain the tank and switch to a 32 /1 mix. I take it you have disconnected the oil feed to the carb from the 2 stroke tank, if not then your mix contains too much oil. Only switch to 32 / 1 if the oil tank has been disconnected. I hope this helps.

torque the head bolts at 35 ftp start at 10 going criss cross and then torque at full 35 fp.

Free: probably not gonna happen unless you can find it at your library. I bought my yamaha manual on Amazon for 25 cents, no joke!

2 stroke engine oil for the engine goes in the oil tank under the seat.
motorcycle gear box oil goes in the gearbox, car oil may cause the clutch to slip.

Check the air adjustment lever. When u start the engine set the air adjustment lever high. When your engine get warm turn the air adjustment lever low. Please try it.

there is usually a washer over the spacer that holds it central in the hub

cover up the drilled holes this can cause problems, why was a new carb fitted? did the shop have it running?
not likely rings .
check carb for flooding and correct jet sizes.
check safety kill\start\run switch for shorts.

ok...whats the problem....need some info...something more than cdi 125cc

your signal will not work because your battery is empty, check your rectifier and your stator coil

I would say the ignition switch wiring is incorrect. The first possition should feed horn, brake light and ignition and position two will run the lights. So find the wire that feeds the horn and brakes then remove it from position two and connect it to position one leaving the lights on position two.
Hope that helps..

http://store.payloadz.com/details/258313-eBooks-Technical-Yamaha-DT175-Service-Repair-Manual.html   $3.95 to download it.

It sounds like it has seized up. Hopefully just the piston rings but you will have to take the engine apart to check.
Good luck.

hi, on an 1981-1995 dt50mx the fork oil quantity is 208ml per leg, hope this helps

Remove, clean, repair and service the carburettor. The throttle is sticking I expect.

i understand your looking for timing and sparks but for what kinda bike we timing
M.Woodring

IF YOU DONT HAVE THE REGISTRATION NUMBER, THEN YOU WILL HAVE TO RE REGISTER THE BIKE, ON THIS MACHINE YOU SHOULD HAVE A MATCHING ENGINE AND FRAME NUMBER. AS DVLA ONLY WORK ON REG NUMBERS AND NOT FRAME NUMBERS MY THOUGHTS ARE THEY WILL ASK YOU TO REGISTER THE MACHINE USING A ( Q)PLATE THEY USE THIS SYSSTEM WHEN THEY ARE NOT ABLE TO OBTAIN THE EXACT DATE OF 1ST REGISTERED. CONTACT DVLA FOR A FORM http://dvlaguide.co.uk/index.php/dvlaguide/register_an_old_vehicle/

Your XT has a self adjusting cam chain tensioner and needs no attention unless it has broken.

The 175 is a two stroke and if gas were getting past the piston it would collect in the crank chamber which is sealed from the gearbox and gear oil. If the gearbox oil is a white-ish color the problem is water emulsifed in the oil.

As far a the cutting out, many things could cause it. The points need filed and set or replaced, the carb and filter need cleaning, bad crank bearings (usually the crank seals are bad also), condensor or coil is going bad. I have listed the items in probable secquence Hold the flywheel firmly in both hands and then lift up and down, left and right. If it is not ROCK SOLID the crank bearings need replaced. Any other questions just post a reply. By the way, you can still get many of the parts to your bike at Babbitt's. Go to the website below to see an exploded diagram of the engine and other parts of the bike. Let me know what you find out.
www.babbittsonline.com/pages/parts/viewbybrand/default.aspx

Can you tell me in English my Spanish is "no bueno"....thank you.