20 Most Recent 2005 Honda CRF 100 F Questions & Answers

here you go

http://powersports.honda.com/2009/crf100f.aspx

http://www.cyclepedia.com/honda-crf80-crf100-online-service-manual/

http://www.themotorbookstore.com/hocrcronsema.html

Is there a spoke wheel on it? If so there might be some loose. If not check the wheel bearings

28 to 30 thousandths

Try new plug .,plug could be fouled.,.,if not prob coil, or stator,cdi?

Check for spark , compression, fuel if you have all them it should run.,.

Air leak? Dirty air filter? Check choke cable make sure it's functioning properly in on off positions.,.., then on to fuel is it getting enough.,could need adjusting/ jetting

Clean air filter.,.get new plug., check for air leak around air intake . What elevation are you running bike may need jetting.,.

Sounds like a water or oil galley seal between the block and head. Is it flat on one side? if it is then it was squeezed together by something. May be it was on a small screw to seal it. If it's hard then it was getting hot or oil was burning the O-ring, I would take the head back off. Better safe than sorry. Been there done that. Good luck

i got mine on e-bay for $40.00.

bowl full of washing up liquid soak the filter, run it under the tap until the suds run out then leave it to dry. works for me

Hi, the adjustments for this bike are as follows: - Pilot air screw turn gently inwards until it stops (do not over tighten as it is easily damaged). Now turn Pilot air screw 2 and five eighth's turns out. Float height is 14.5 millimeters. Idle speed is 1300 rpm plus or minus 100. You can download free service and repair manuals for this bike from the web.

It's got to be in the throttle cable, sometimes depending on the carb, the top assembly cap isn't seated properly and the return spring won't let the slider actuate up and down. also the floats in the bowl assembly may not be seated properly?

Check the basics. Spark plug and lead. Clean your air filter. May need a car by clean

Turn the motor over clockwise until the punch mark on the gear lines up with the arrow mark on the side case. Check to be sure that the cam lobes are facing to the rear of the bike, if they are pointing toward the front keep going until they face back and the punch mark aligns up with the mark on the case.

Check the cam gear to make sure the two marks on the gear are level with the surface of the head.


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Sounds like your fork seals are worn out. It is most likely time to have your forks rebuilt.

The Honda CRF100F 2003-2005 has a 100cc engine and uses a spark plug gap of .7 mm.

The Honda CRF70F 2003-2005 has a 70cc engine and uses a spark plug gap of .7 mm. I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

The carb jet needle clip position controls partial throttle conditions. If it hasn't been moved from it's stock position, the needle is probably worn and should be replaced along with the main jet and the e-clip put back to the stock position. It's really hard to see if they're worn because the parts are so small. They're cheap parts and the fix is pretty simple so good luck!

First be sure there is adequate oil in the gearbox. Hard shifting is indicative of a bent shift fork or two. The engine will need to come out of the bike. Remove the top end, the flywheel and electrics, the clutch, shift shaft and kick starter and a few other parts. THEN you are ready to split the gearbox to get to the crankshaft, gears and shift forks.

You will need an impact driver, flywheel puller, case splitter, torque wrench and factory service manual, plus the normal screwdriver, pliers, etc.. Alternate to the special tools is taking it to the dealer and say "Fix it". I normally tell people to take it to the shop just so they don't get into such an involved project and they have a knowing eye working on the engine. Below is a diagram showing how the shift drum moves the shift forks left & right to change gears. Please rate this answer. Thanks.