The guy who sells them is Steve Tabb and rides down here in cornwall.
I have rode a 09 290cc with one fitted and it does calm the power down quite alot. The lads bike it was, is a novice rider and seems to do alright.
I also ride a 09 290cc , but the only thing i have done is retard the ingition timing a little and think this is all the 290cc bikes need.(once set up well)
Gas Gas do the same head spacer for the Pro engines and i had one fitted on a 05 250cc which made the bike very soft and docile.Made it grip better in the mud and was alot easy to ride.
They are easy to fit with a little sealer on both side,but you do have to take off any sharp edges which might be left for mechineing.Bit of wet and dry paper works well.
For the money they are a cheap way of calming the bike down and if you don't like the way it rides after installing,not a big job to take out.
A kenlin carb will help a lot..Lets the bike rev much better from off the bottom.
I also found with the 125cc bikes that the piston and bore needs to be in top condition to get the best out of them.. New rings on a good bore or new piston kit and replate on a worn bore.
"Also, a final bit of gossip that he said to me was that he has designed and plans to have for next year (in same frame) a 4 stroke 300+cc with as much power as 2 stroke, side valve, wait for it..........supercharged!! Is that made up?!? If true I would assume it would run a carb with charge air blown through it...time will tell I guess!"..
Don't run the 320 with ATF use a good 10w/40w oil.
I ran mine with only four springs and it would only slip in 5th gear with a big handfull.Made rideing in the sections alot better as the clutch was very on off with all six springs in.
The spring bolts just need to nipped up thight with a spanner.
I've had a ride on a new 2011 290 and found that it was a lot smoother than the 250. Weather it was just setup better i don't know,but it was a lot better off the bottom end than the 250.
Not saying go and buy a 290, but find someone who has one and have a go..
check the brass insert in the carb. body,which the throttle needle goes into above the main jet, has not fallen out.I had this happen and it caused me a right load of grief.I thought it was an interference fit and not ment to come out!Luckily we found it on the floor.
Ha Ha i had this happen to me aswell....took me a bit of time to work out what was wrong..The bike would run,but was missing and popping like mad...
I take the carb off after every time i wash the bike and blow out with compressed air. Takes five minutes at most, also wash out air filter box and reoil air filter.
I've also found the kelein carb to very senative to water and needs to be spotless to get the best out of it...
I sort of miss not haveing a sight glass on the 290..The 320 had one and all the gasser i've have had have them too.
I think on the four stroke its was more important as the service intervals are longer than the two stroke. It gives you a good idear of whats going on and if you need to top up before a big ride.
Can't rellay see you would ever knock or hit a rock with it,so would not see that as a problem..
The ones on the Gas Gas where very usefull, as both bikes where haveing problems with water pump seals and crank seals..
You only had to have a quick look and you see the oil was either milky or had gone down.This helped service the engine quicker after seeing the problem.
With the 290 i just change the oil every third ride and put 450ml of 10/40 back in...
That a rellay good website you got there chewy...nice to see local people makeing some nice parts for us trial riders..
I'd be intrested to know how the springs are going,, as i've done the dan willams mod and removed two springs,but i still get a bit of slip in top gear..i'll send you a PM so we can keep this thread open for the clutch saver...
On which note if you would like the one i have so you can take some measurements ,then i'm more than happy to send your way..
I can toolpath * machine * anodise colours if you wanted to send me a DXF file I'll get around to drawing one soon after Footrests ,levers , brake pedal should keep me busy until holiday time!
Hi chewy,, have you any photos of the foot rest that you make and any other parts..???
Also did you find any lighter spring for the sherco clutch ???
6004 2RS bearings on the 'bay
in General Trials Talk
Posted
I use them and never had any worrys with them...
Its worth regreeceing them before you fit them. Just pick the seals out and push some better greece into the brearing and then replace seals.