The fuel tank on the 4t is only just over two liters but it does seem to use quite a lot

Has anyone worked out if the new four bangers are really thirsty

What about the honda?

How much does a 290 2t use on an average trial?

I have been on reserve a few times and run right out once

i recon reserve is about 10cc watch out

It sits a bit higher which gives the impression that the tank is bigger than the 2T but is actually a smaller capacity tank, likewise, mine went on to reserve quite quickly, but that was in the first hour of use.

I was looking for an excuse for a quick rest at trials having hit the big
four o

now i go back to the jeep for a splash and dash (me and the bike)at half distance better safe than sorry

my 4rt is easily better than the gas gas i was riding with in scotland
no fuel worries at all

My 4RT seems thirsty on fuel. In the SSDT, I actually ran out on the Thursday run from Fort William to Chairlift, about a mile or 2 before the fuel check, and again on Friday on the moors but luckily only about 200 yards from the check. Don't know of anyone else running out, just me I think. It also seemed at the fuel checks that it was taking longer to top up my tank than the 2 strokes - which is strange given that it is a smaller tank - or so I believe as I haven't measured it.

Out of interest, I was told that according to Sandifords, the 4RT has a 2.2 litre tank and a range of 70-odd kilometres, whereas the 315 has a 2.7 litre tank but a range of 37 kilometres. This is what someone told me, I didn't get that direct from Sandifords themselves so don't know if it is correct or not. Didn't seem that way when I had run out......

Does seem strange that it uses more fuel than I thought it would. My old YZ426 Yam would do 2 hours plus racing to a standard motocross tank which was easily better than a 250 2-stroke on a similar sized tank. Would have thought that the 4RT and 4T would have shown the same fuel trend in economy.

Not a very scientific answer, but in case it helps...when I go out riding with my pal on his 4RT, I always run out of fuel before him..(my bike is a Beta Rev3 270)...mind you, I think mine is guzzling more than some other Betas out there.

you on standard gearing woody?

I rode a 4rt in Scotland and no problems at all, was pulling higher gears across the moors instead of buzzing it, but that was purely for pace and not thinking of fuel economy!!

I think the reason for the slow refill is that brace that runs across the tank just inside the cap hole. The army guys just took it easy instead of it p***ing everywhere!!

I never geared it back to standard for SSDT so back sprocket was (is) 43 teeth. I was up to 100kph on the road at times but that was in no way buzzing the motor - never felt under geared felt like there was plenty left but I never went over that. Likewise on the moors and tracks it would pull 4th and 5th so wasn't really buzzing it. Thought it may be because I had the vent holes taped over in the mudguard to stop muck getting around the airbox - maybe that caused it to run a bit rich.

I know what you mean about the brace and it could be why it took longer to refuel. It was really p*ssing the army guys off

Yeah, though by midweek a good few of them had got the hang of it & got the nozzle in beyond the brace, no problems then!!

is everyone with a sherco 4t having starting problems ?

Not everyone.

Mine started second or third kick yesterday after sitting a couple of weeks. there is a knack to it!

However there was one at our trial today wouldn't start, seemed like it wasn't getting over compression properly. Eventually started and ran like a dream later in the day.

Some have problems, some not it seems.

Big John

I did till I found the 'proper' way to start the beast! ( see the sherco/bultaco forum)
But when its running ooOoOoOoOoOoooOOOOHHHHH . its sweet

The only trouble i have when hot is opening the throttle slightly out of habit

if this occurs i open the throttle about a third and boot away ,four kicks normally has it purring

other than that it is normally second kick and away

the power seems smoother now it has 30 hours on it and it has stopped burning oil on initial start from cold

Just got my 4T ,and I`m 58 kilo`s. Tore my hair out trying to start it !!!
Turns out the decompressor was not working properly. I was throwing myself at the starter, to try and turn it over.Now I just press down on the lever and it fires into life, almost as easy as the Montesa.
Noticed that when the bike is turned off there is a metalic "clack" as the decompressor engages at low revs, as the motor winds down. This was not evident before, when hard to start. Hope this helps anyone with starting problems. Totally transformed the bike !!!!!!!
Cheers,
ShercoH.

Hi Howard

Glad to see you got it started - had us all a bit worried hiding behind the van by section 2 there... but how did it go, should I start saving my dollars and being a model husband for a few weeks...

Paul Mac

Paul,
Runs great, plenty of torque and traction, just a little distressing with the starting. Different bike now though, catch me at the next meet and take it for a run. Start saving your dollars, and always be a model husband !! not just when you want something, they have long memories I have noticed.
Cheers,
ShercoH

Howard the automatic decompressor works by a shaft attached to the centrafugal weight which is spring loaded to engage when the engine is stopped. when the engine fires and runs the weight gets thrown outwards and disengages the shaft due to a flat machined in the shaft.
I checked my engine tonight and i can get you a photo if you would like to see it in detail. I am very impressed by the build quality of the engine and the internal finish of the castings. I also loosened up the triangle casing and removed it to fully check the start mechanism. My bike starts well after setting the float level to 18.6mm and now it does not flood the engine.
The bike did not miss a beat during its first trial at the w/end and a few riders had their first taste of the 4 stroke magic. The longer it was ridden the better the engine seemed to get and now after its first service and checkover I am looking forward to the next trial.
johnnysherco

Johnnysherco,
Thanks, I`ve had mine apart and fixed it, while checking the shims. Couldn`t believe how easy it is to start now!!!!, as I was battling against the full compression before. Sure is a simple setup.
ShercoH

Howard... what did you do? Replace the decompressor?

Big John

Big John,
This is the embarassing bit, I`m not sure. Removed the tappet cover to do shims, checked the action of the de-compressor, understood how it worked ,and all looked fine. Re assembled motor and realised how easy it was to kick over.And noticed the "clack" evident when turning off,as I hadn`t heard it, after riding the bike for several hours.
Did a service on another 4T, last night ,which had the same symptoms. Checked the actuation of the de-compressor and again it looked fine.Ran the motor before hand to check if I could get it to clatter when at low revs, and it wouldn`t. But an re-assembly, it`s working fine.
I`m missing something, will check if the tappet cover or the gasket can possibly get close enough, to affect the compressor weight.
Will definately let you know if I find something, as I`m not a great believer in Black Magic, although at the moment it`s on the list.
Cheers from a baffled,
ShercoH

Yip my model and the MRS demo model I rode before buying made a "clack" sound when the motor stopped, after pressing the kill button. Presumably that's the decompressor resetting, maybe?

Let us know how it's resolved.

Big John

Big John,
Yes it`s definately the de-compressor, when the motor drops to low revs, the weight on the de-compressor, is not being thrown out , and starts to engage on the exhaust rocker. It`s a sound that`s music to my ears, as I spent two days trying to kick mine over without it working, absolute nightmare. Total opposite now though !!!!!! Spent two days solid on it, and am totally wrapped in the bike, especially in the wet !!!!!
Cheers,
ShercoH