Author Topic: 2020 fouling plugs  (Read 319 times)

Piperep91

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2020 fouling plugs
« on: August 27, 2020, 12:30:22 PM »
hi new to sherco and just bought a 2020 sherco ser300 factory. Love the bike but every 6-8 hours the bike stalls and wont restart, fit new plug and its perfect again. Pervious owner changed jetting amd needle,
Not shur what is the standard, and as regards the idle screws not shur, the idle adjust screw is out 3 turns amd air idle screw is  2 turns out but adjusting these doesn't realy do anything,
The needle is on clip 1 also.
Thanks

alang

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Re: 2020 fouling plugs
« Reply #1 on: August 29, 2020, 08:40:06 AM »
Try N8RG Or N8RH needle.
Also check coil is ok.
Could be a recall item
2017 Sherco 300 2T Factory
2016 Aprilia Tuono 1100 Factory
2019 Santa Cruz Tallboy Carbon R
Azle, Texas

Strosek

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Re: 2020 fouling plugs
« Reply #2 on: September 10, 2020, 07:51:20 AM »
What plug is in the bike?  Many people have BR8's on hand from other bikes and use them when you should be running a 7.  Just check. 
But as already mentioned most likely jetting is off.  Take it apart and see what you're running.

O2B

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Re: 2020 fouling plugs
« Reply #3 on: September 10, 2020, 02:42:16 PM »
why I will probably be going Lectron (external PowerJet/Main to adjust and a metering rod)....
Sherco is a less than desirable bike to be monkey'in around doing finicky Carb adjustments.
seriously, is it necessary to detach the silencer and subframe everytime just to access the bottom of a frickin carb (pilot and main)?

love the bike and the way it rides BUT.....there is the price to pay for a very compact engine compartment.
« Last Edit: September 10, 2020, 02:49:35 PM by O2B »

EnduroMD

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Re: 2020 fouling plugs
« Reply #4 on: September 11, 2020, 12:45:01 PM »
I have had Lectrons on both my other bikes. Once the Sherco is jetted, you really don't have to mess with it. I had the same thought when I bought the bike. They do come with rich jetting from the factory. I went down on the pilot and main jet and put in a Suzuki needle NECJ I think. I haven't touched it since. The Lectron is a tight fit and the throttle cable probably will need to be changed too.
2019 Sherco SE Factory
2013/2015 KTM 200 (linkage)
2012 KTM 150 Son's bike
Goshen, Indiana, USA

rkm

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Re: 2020 fouling plugs
« Reply #5 on: September 11, 2020, 01:08:39 PM »
why I will probably be going Lectron (external PowerJet/Main to adjust and a metering rod)....
Sherco is a less than desirable bike to be monkey'in around doing finicky Carb adjustments.
seriously, is it necessary to detach the silencer and subframe everytime just to access the bottom of a frickin carb (pilot and main)?

love the bike and the way it rides BUT.....there is the price to pay for a very compact engine compartment.

Man you are doing it the hardest way possible  :o

O2B

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Re: 2020 fouling plugs
« Reply #6 on: September 11, 2020, 01:16:45 PM »
ok...
so what's the suggested recommendation?
pull the cable and carb top/slide out first, loosen the clamps and twist the carb body topside towards the pipe?

Or just continue being "vague and uninformative"?  :o

« Last Edit: September 11, 2020, 01:20:28 PM by O2B »

JL4049

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Re: 2020 fouling plugs
« Reply #7 on: September 11, 2020, 11:26:12 PM »
its only a 2 minute job to remove the tank, that should give you enough room. You can just take the one bolt that fixes the shroud to the radiator on each side and the two bolts that attach the tank to the frame. Then you can remove the tank and shrouds as one piece. If you don't quite have enough room to turn it far enough then, just take the carb off, that's only another 5 minutes. Pulling the tank and carb, changing the jets and putting it all back is only a 2 beer job. I like to throw the JIS float bowl screws in the bin and fit socket head cap screws the first time I do it too. (M4 x 15mm from memory).

O2B

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Re: 2020 fouling plugs
« Reply #8 on: September 12, 2020, 10:43:14 AM »
yep...aware of that,  ;D
have two 2017 KTM 2t's also, I always remove the tanks with those as well, those bikes have more engine compartment space to work within (loosen clamps and turn carb, that's it).

the sherco's back air/carb boot separates from carb easier than expected.
try to twist with both boots on carb (w/clamps loose) the front right bottom corner of the carb hits the case.
regardless, removing tank wasn't the concern and KTMs have more pieces of hw (tank/shroud) to remove.

it's all good now....if anything, the throttle cable length could use an extra inch or two.
that'll change after the retarded integrated throttle housing/starter/map switch is adios'ed.

back to the OP's original post and plug fouling.....for the 2020's, are the jetting specs from the manual pretty accurate or still tuned rich from the factory?
for me, the Mains, Pilot's and Clip positions are easy.....determining best needle can be a challenge.

I'm at 500ft asl and 85 degrees, I'm starting at 165mj n1eg 2nd clip and 42 pilot.
« Last Edit: September 12, 2020, 10:56:55 AM by O2B »

alang

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Re: 2020 fouling plugs
« Reply #9 on: September 12, 2020, 07:02:34 PM »
try 38 or 40 pilot
2017 Sherco 300 2T Factory
2016 Aprilia Tuono 1100 Factory
2019 Santa Cruz Tallboy Carbon R
Azle, Texas