Well, yesterday I fitted a VHST to my 175 Gasser. These come with same std carb/jetting as 125 (so one of 'ems wrong!).
It could be the float vlave, as I understand these need upsizing to 250 or 300 to work. See posts on this forum somewhere - lots on the Beta page.
The VHST uses the HE needle jet, I assume that's different than orig carb.
Anyway, I started with 266HE, D36, S37, 300 float valve & clip 2 from top. I only used the 266 as no 268s were available.
After testing, I lowered needle clip to groove three and then went to pilot 34.
I'm using Boyesen reeds and the small flywheel too.
Definately an improvement, before the 175 was a right wizzer, almost too much go. Now the go is still there when required, but the bottom half of rev range is smoother & has more torque, feels like a trials motor now! I could ride tight dry sections in 3rd & 4th now, not ideal, but a good test to see if you've progessed with the tuning.
Riders wanted for our AMCA South Coast group trial. Open to any rider. No licence required. Three routes with all the usual clases. 12 sections 3 laps set out by Hrc1 and our local 4RT ace - King Clint and all in 70 acres of beautifull Surrey woodland.
Unusually, for this series, its pre-entry only. Looks like we missed the deadline for the TMX regs so we've extended the deadline until the 7th May.
Regs are on the club website, www.hrc1.org or see the TC calendar. Any info PM me or call 01403 257626, Thanks, Mike
I hadn't ridden this for a few years and had forgotten how good it can be, particularly when the sun shines at Easter. Using the same venue, and rocks, as last years French world round was a shock for some of the English riders. Later the sections returned to the standard I remember - easier than all the other French trials, which is fine by me on the S3 route.
Small things make the days easier - no real time limit, food and fuel supplied and an amostpheric arena style final section that turned out to be one of the trickiest on the top 3 routes too. Michael Brown was best expert and Ben Wibberley third in S1 class. Scarborough clubmen topped the S4 and Randonneurs classes too.
I had a 640 Enduro - had two sets of off road size wheels, one with knobblies, one with smooth tyres. Could change wheels, discs & gearbox sprox in 30 mins. The one bike does all idea didn't quite pan out, still I rode the Welsh, an LDT & a French trail trip on it but sold it in the end - I couldn't stand the vibes no more...
Like Totalshell my cub ran best on a TL125 carb. These are hard to find, but with all these pit bikes about now - small carbs are everywhere now (see Eblag).
I understand there's a Villiers carb that works & is still within the rules. However - rules differ & it may be worth having different carbs or different series.
Beg to differ, old chap. I tried the vee force on my beta and it flattened the power like it was restricted. However this was a 250. So off they came. I've tried various reeds over the years - Active, J.Clerch, Boyesen etc. And all except the Boyesen appear too stiff. Maybe these stiffer reeds only work on the bigger motors of engines with higher compression - anyone confirm?
Btw - used Boyesens on my Pampera 280 for years ( best for smooth torque) & just added a set to the new toy - a 175 Gas Gas.
Fits under Hebo trials trousers okay & gives good knock protection & an element of support & warmth. I've used mine for a year now & highly reccommend.
Had a couple of hours riding in the yard & setting up the 200 on the day before, but its funny how it needs to be ridden in a trial to really set it up. Which is why I stalled it in section 1......... 15 sections later I moved levers, bars & brake pedal to ease control & the next laps were better. Tricky trial though , that Dunlop trial, even on the Inter (middle) route.
So what did I learn about this 07 200 Gasser? Its a rocket! Certainly no shortage of revs or power. Even on the low gearing (9T front) it blitzed all the hills easily and only in second. However that power is largely at the higher revs and so needs a different technique than the 250s I've had before. My result would suggest I'm still searching for that technique....
It feels like a turbo 125 rather than the tamed 250 feel a 200 Beta has. So some mods required - Boyesen reeds, flywheel & slow throttle are to be added before this weekends club trial.
05 125 Pro Carb Jet Sizes
in Gas Gas
Posted
I used the 105 main too. I suspect the float valve or, just maybe, the different spec needle jet as the problem.
What is the diffference between as HE & K needle jet?
Interested to see If you find cure.