The main jet is round, slotted for a flat blade on the end of the nozzle/needle jet depending on which decade you learned carb parts.
Hadn't twigged until I watched the jim snell video on the 26mm Dellorto carb... then GG-UK yesterday told me it was the mixer jet... never knew such beasts existed, just thought it was a quick of the weird little carb on the GG. Think I was sober when i stripped it the first time....
How the hell did you work out who I am and get on my Facebook page..... that's me done......nice detective work.....that's me around 1980..my hairs gone green now......the .Golden years........Marvellous.
Must say that I do like the old Eraserhead Avatar....
Sounds like you could do with a spare carb that has jetting for a 20C and the other is set up for 40C if it causes major problems for you so you can just do a swap as needed.
You only need to swap the pilot for low down and needle and main jet for mid/high. The rest is pretty fixed. ?
Makes it look very complicated... follow the jetting tables, tune by feel and stay on the safe side if you’re not sure. If you run the same jetting at 40’C as you do for 20’C and below, especially on sandy surfaces, you’ll run too lean. Temperature swings a lot here.
As above... do such beasts exist? Any good jetting guides for them? Anything different to set up for trials engine vs an enduro motor (no PV or spanny)?
Spoiled with years of KTMs and their excellent jetting tables, selection of spare jets in the box... this is my first trials bike / GG. Out playing yesterday and it was quite a bit cooler than when I’ve been riding before (good 10’C or more), bike sounds a lot crisper but couldn't quite suss out if it was running lean or not. Felt maybe a little flat, thought it was running a little bit hotter... but wasn’t sure if it was just colder and I was noticing the heat more.
Let me know about the above... flying home tonight and need to order chain sliders over next few days, so will order some jets (forgot to be honest!).
Attached the jetting details from when I stripped the carb last time to clean it....
Was jet washing the bike today and heard a thud, looked down and saw the front part chain slider by the sprocket had broken off... I know these are a wear item, is it common for them to snap there? Maybe snapped it yesterday playing on the rocks and didn’t realise....
Can you get at the retaining bolts by taking the rear wheel off?
Good time to swap out the other chain runners/guides as well?
Just finished the rest of it there... fair play to him. A brutal reminder of life back home.... beautiful on one hand and cruel on the other! At least it wasn't raining sideways.... made me a little homesick.
Following out of interest as I have the same bike.... starts ok just now. Ordered a new plug recently as it decided to take a bout 10 kicks when I stopped last time I was out just before I got back home, was going OK up to then but I know they can be problematic.
Aye.... welding areas are corrosion hotspots due to various mechanical, metallurgical and electrochemical reasons.... google it if you’re bored. I spend all day explaining them at work, I’m out. ?
Cleaned up a bit actually.... was in about with with degreaser First then rust remover. Not had a chance to fire it up and check for blowing properly because of work! But going to order some bolts and gaskets just in case as I need to order a new fuel cock.
Any chance there's a leak and what you hear is air being sucked into the pipe? Consider simply running a bead of high-temperature silicone/RTV around the flange/pipe junction and see if anything changes noise/cleanliness wise.
Did that with the old 200 EXC... worked a treat, still got some there as well.
Sounds like a plan.... my tyres wont make it in time for the track this weekend so I'll have all weekend to clean it up and check.... on the plus side my new trials helmet is coming with the tyres, every cloud! Cheers guys, I will check it over properly at the weekend but as for cracking those bolts.... no chance!
Bike isn't using any coolant but that's a good point worth checking... I think the rust has come from playing on the scrubland behind where we live, its salty and marshy and I've probably missed that as it lay dirty for a couple of weeks after I broke my hand. I didn't realise how bad it was till I had to clean the bike and the Mrs quad bike.
So taking the rust aside... there's no history of these blowing the exhaust seal and soot collecting on inside of the pipe from the exhaust gas leaking at the flange/pipe joint?
Taking the bolts out the head is like Russian Roulette.... its happened to me before but luckily during a top end rebuild (exhaust flange on my old KTM 200 EXC). Anyone snapped them themselves on the GG?
On the KTMs the Viton rings go and they start blowing.... not sure of the seal on these. Top of the pipe looks more like soot, that’s what I noticed first. The corrosion came later.
Broken Chain Slider (07 TXT Pro)
in Gas Gas
Posted
Parts arrived.... get it done this weekend