I'll be doing a full youtube video on the process when I'm done - channel name is 'MrTwoSmoke'. 

I have managed to find a fix for the ongoing gas gas boy ignition problems,i have repaired my sons bike and his friends and we have had no problems after much testing and the parts are readilly available .I am not offering to carry out the mod or sell you the parts as i seemed to suffer a fair bit of abuse and negative comments from forum members last time i tried to help . for the information sheet email me at racing50chris@aol.com

Any negative comments please keep them to yourself as i only deal in the positive

doing some research before attempting to change the crank seal on my 2011 raga 280..

any how to videos or advice appreciated..!

thanks for any info..!

I have a question for the guru's out there.  I have a 2010 TXT Pro 250.  Lest year I noticed that there was fuel in the gearbox oil when I changed it.  That precipitated a complete engine rebuild.  Glad I did it because it was pretty worn.  I had only had the bike a few months and bought it to get into trials (a decision I dont regret for one minute  )

I bought literally every seal and bearing, clutch, top end, crank was rebuilt as well.

When it came to fitting the main bearings I took them out of the box (The new style XiU-rdiOnes) they were so tight that it was impossible to rotate them.  IN other words, you could not rotate the inner of the bearing at all.  Even with significant force.  I was told that they are quite tight, but this seemed insane.  Anyway, went ahead with fitting, cases heated, bearings frozen.  Tough to get them in, but they were seated.  Bolted the cases up and the crank was literally solid.  I have rebuilt many many engines over the years and I have never seen a set of bearings this tight.  The crank could only be rotated by popping a high torque cordless drill onto it.  After a few minutes of this, I could now rotate the crank (just) by hand.  This really didnt seem right to me.  Anyway, I was assured by some that this is normal for these motors.  It started up fine and ran well.  However, there was a constant loud whirring noise which was not there before.  It did get slightly less, but has not gone away.

After a few rides I noticed that it is starting to use gearbox oil, but it doesnt smoke.  So I popped off the flywheel cover and its full of oil.  So the left side seal/bearing is failing obviously.  

So it all has to come apart again and get some more fresh mains and seals.  

My main question here is about those bearings.  Are they really meant to be that tight?  I cannot believe that they should be that tight. Surely this will generate massive heat and possibly destroy the seal and the o-rings in the bearing?

I have never come across a main bearing that cannot be rotated by hand (unless it is seized) brand new out of the box.  Makes me think that I was supplied a bad set of mains?

Thoughts anyone?

Nigel

The gasgas is so much longer than the sherco, the reach seems quite a bit longer. For guys that have ridden a bunch of different trials bikes, you guys find that? How did you adjust?

So, here's what I know so far:

1) Spark is very weak, unless you spin the motor very quickly (plug out and with hand or foot on kick lever) Anything less than rapid movement gives zero spark.Comparing this with my 280 of same year shows how weak it is, 280 shows a very nice spark with just a modest movement of kick lever with hand.

2) naturally, have replaced plug, platinum tip etc, made sure high tension lead is making good contact etc.  Have swapped cdi *and coil *with the 280 with no difference which led me to the  conclusion that the stator must be bad,  wrong!!  My first rate dealer, Dave of Gas Gas pacific quickly expedited a new hydria stator to me and I thought must  have the problem beat but alas it's essentially the same.** As a side note, coil is the same part number between both bikes, CDI is a different #, obviously different mapping but functioned to give a spark (weak mind you)

3)Of course I've checked the carb, thought of trying a 55 pilot but the bike once running is perfect and besides, I'm already convinced the weak spark is the culprit.

I'm hoping we can get to the bottom of this because it just isn't right and I'm about to pull my already thin hair out!!

Thanks for any knowhow offered,  Cheers

Im trying to establish if they are C3 or standard bearings that are required. I’d have thought C3 , but just making sure as it’s for a friend.
 

Thanks everyone. 

Ive a small issue with my bike , it can be tricky to start, it feels like the kickstart is only engaging at the bottom of the stroke of it. 
I know this model can have a knack to start but any feedback or help would be great.

Also the clutch casing has a crack in it (please see attached photo) where kickstart runs through which I’d assume would not help. What could cause this to crack ? 
Again any feedback and help would be greatly appreciated 

Cheers 

Paddy 

I have a 2012 TXT 250 I ride near every day.

Went to town for milk and bread and when I tried to gear down to 3rd it would not click in.

I rode home in forth and drained the oil. It was clean.

Topped up the gear oil and went for a short ride.

3rd 2nd 1st now work but no 4th or 5th.

It's now parked. I'm in Central America. Parts are limited.

My son is going to California in a week and thought maybe he can get what I need to fix my gym on wheels.

This bike keeps this old man healthy and fit.

Any advice much appreciated.

I'm thinking this is the problem in the screenshot attached

brian 

Im wanting to do an oil change however can’t seem to find a fill port? Iv seen the drain plug underneath in the bash plate hole, however can’t seem to find a fill port? Looking on forums eveyone seems to say it’s behind the kick start with an Allen key nut however mine does not seem to have that?? 
 

picture below for guidence, any help would be appreciated. 
cheers 

im just trying to figure out if I need to take the engine out or not as I’ve never done it before and dont want to do it if I don’t have to. But I want to do as much as I can myself to save money as the bike cost me a lot. 
 

thanks in advance for any help, I might end up taking it out soon anyway it’s just a bit daunting