Top 20 2005 Honda CRF 250 R Questions & Answers

Where is your mixture screw set to?

take it back to the shop that rebuilt it...tell them/show them.... they should fix it...

Check your coil!

float level set to high or bad needle valve also could have a speck of dirt keeping it from sealing

check thd kill switch ! remove plug cap off the ht and see if you can feel a voltage as you kick over the engine ! it wont kill you but easy way to know if coil is working ! plug caps resister break down !

Only way to properly remove rust is using a emery paper, a wire brush and/or sand blasting. When cleaned prime and paint. For scratches on paintwork you could try cut & polish compound found in auto stores.

I'd use Motul 10w 40. Bit expencive but good.

I would use Valvoline 20w50 VR1 racing oil.

Do you have the timing marks at Top Dead Center?

13psi is most commonly run in the back and front

Do not move the throttle. Open the choke, give her a kick. Has it ever started before?

best to replace whole throttle on handle bar with cable

check you water pump, could be clogged

you need to remove the gas tank to get to the plug, remove the seat now the bolt to the gas tank and the bolts holding the plastics to the rad. there is a fuel petcock that bolts to the frame turn it to off and remove the lower gas line from the petcock. pull tank off and there is the plug. be careful with the valve cover and the socket you use it might get hung up.
Best of luck
Mark

Could be a bad head gasket, cracked head or cracked cylinder. You wont know which one for sure until you have it disassembled.

57psi is fine if you are using the decomp lever when checking the psi. The normal psi without the lever is 120min to approx 200.

OK I can't give exact reading for Honda specific but I do do this test on Yamaha YZ WR etc all the time and your reading would be very simular if not the same
You should have a connector with 3 pairs of wires (6 wires) coming from the stator
You need a multi meter preferably with auto ranging OHMS reading or just set to OHMS (the upside down horse shoe setting)
you need to test each pair separately and starting with main out put pair (red and something colour wire) you will get 260 - 360 the next pair you would expect 700 - 1000 to show on meter reading and the third pair you would expect to see 40 - 70
Now these will not be perfect ranges for your honda but trust me if your stator is faulty then you will get way out numbers like 002 or 010 or 4000 all of which are completely out of spec on any of the 3 pairs so you will easily spot your stator is no good
cheers mate good luck
regards Jamie

The oil capacity is marked on engine side as well as gearbox side. On gearbox side there is a 8mm screw just before the clutch cover. Take this bolt out and fill until the oil start coming out this hole, should be about 600ml. Do not use full synthetic oil in gearbox, this does not work well with the clutch friction plates. On the engine side put about 500ml (depending if you changed the oil filter as well), then check level with diptstick by placing diptstick in hole WITHOUT SCREWING IT IN. Fill with little bits at a time until you reach the max mark on the diptstick. Start engine and warm up. Shut down and leave for 3 minutes. Check oil again. DO NOT overfill engine side.

Is the remainder of the bolt still in the threads??? Get a good bolt extractor to remove it.
If the remainder has gone in the engine, if you can't get at it with a magnet (get it to the hole and thread it out) you will have to get the engine split.

This sounds like the lower bearings have gone out, and needs to be replaced.