Messages

46

Technical / Need fork seal replacement instructions / vids

« on: August 07, 2012, 03:24:30 PM »

I've had the bike for 4 years, and have never changed the fork oil, or serviced the forks.

Wow 4 years, that is overdue I do mine once every 2 or 3 months. 40 to 50 hours of riding actually.

47

Technical / Need fork seal replacement instructions / vids

« on: August 02, 2012, 02:42:55 PM »

IMO most of all times the forkseal is dirty and with a business card you can clean the seal quite easily.
Take the dust seal down, and push the business card between the seal and the  fork leg, go around there once or twice till clean oil drops out.

You could refill the forks but preferible is a complete oil change. I prefer atf, I change fork oil every 40 hours.

Get some seal safers mount those and forget about dirty seals. 

48

Technical / 2001 TM RAcing 125mx Piston meltdown

« on: July 12, 2012, 02:44:07 PM »

When you ride track your jetting has to differ between a drag race and a track day specially when the drag race is quite long.
Street or open dirtroad WOT requiere quite a lot on the main, tell me where is your needle at? I run 4 rth on the JD red needle and 3 rd on the OEM in my 250s. 

49

Technical / Clutch cover gaskets

« on: July 06, 2012, 01:50:45 PM »

I buy gasket paper, thickness about .5mm and do those gasket myself. I think they are suppossedly one time usage anyway. 

50

Technical / FMF pipes. SST vs Fatty

« on: July 03, 2012, 02:50:36 PM »

Yeap I know, occasionally I browse ebay and have a look out for pipes. OEM, Doma, PC are my favourites. The Doma pipe is huge compared to the others. You need to look for those quite often before a good deal shows up. But pipes are articles which get wasted over time.

51

Technical / cr125 leaking HELP

« on: July 01, 2012, 02:53:03 PM »

Most likely the sprocket's seal if the sprocket is loose it also beginns to leak. Check the bearing behind the seal it likes to go if the chain is run too tight.

52

Technical / KX 100 won''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t start - All the Usual Fixes won''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t work

« on: June 25, 2012, 10:27:07 PM »

The bottom end had been recently replaced by the owner before the guy I bought it from, with a Hot Rods rod and new bearing and seals.

That makes it the work of the pre-pre-owner and it makes me wonder when "new" losses its value for you. 
I had to replace crank seals just after a few hours (20) of a bottom end rebuild.

53

Technical / RM 250 Crankshafts

« on: June 25, 2012, 10:22:02 PM »

Your best bet is to look up part numbers.

54

Technical / YZ250 Crankcase

« on: June 25, 2012, 10:21:12 PM »

Sorry to hear that.

Have a look at those at ebay, your best bet to get those. S far I'm aware the 2000 and 2001 engines are identical but better make sure and compare those parts numbers.

55

Technical / FMF pipes. SST vs Fatty

« on: June 24, 2012, 01:20:54 PM »

Are you flexible enough to try Doma? I got a complete sytem of ebay and with the JD kit I'm happy and can recommend those.

56

Technical / 38 PKW Airstrike Carb from JD jetting

« on: June 23, 2012, 04:04:25 AM »

Thanks
I run the bike with vortex cdi and JD kit with the needle being on the 4rth, so mostlikely I stay with the PWK 38S.

57

Technical / 38 PKW Airstrike Carb from JD jetting

« on: June 22, 2012, 12:23:40 PM »

The RM 250 car is a 39mm and the YZ's carb a 38mm I think so 1mm could make a difference, that at least is what I'm hoping.

58

Technical / 38 PKW Airstrike Carb from JD jetting

« on: June 21, 2012, 06:30:50 PM »

if you want a large keihin with TPS, get a 39mm TPS from a late model RM250... cheap on ebay.

I got a '08 RM250 PWK here and wonder:
first how I do connect it to the YZ250 '09 I plan using it in and
second what would be the benefit vs the stock's PWK s?

Sorry for the highjacking 

59

Technical / 05 YZ250 jetting

« on: June 15, 2012, 11:09:09 PM »

Ok but how do ride they bike hard or not hard, fast meaning th e 3 rd gear at less the half wot?

60

Technical / 05 YZ250 jetting

« on: June 14, 2012, 09:45:48 PM »

I would not rely just on the spark plug color, the head give you the idea where your jetting is.
And if the jetting is correct you would have a pool in the crank ca. 1 to 2mm of premix oil.

Advance timing makes the spark plug gray. I get a dark gray plug color but the head plus the pool in the crank tells me thet the jetting is correct. When ride harder and harder most people forget that they run the engine higher and need to put the jetting in the area of racing jetting.