Question about 2006 Gas Gas EC 300

1 Answer

Backfiring when starting

Every now and again my 05 EC300 backfires a 'chuff' sound out of the pipe when kicking it over

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 2,712 Answers

Normally when giving it a bit too much gas. I'm thinking it's timing related and have had a small mess around with it before. I've elongated the hole in the locking tab on the stator and advanced the timing slightly (roughly 1mm of rotation) this seemed to give me a little more top end but hasn't got rid of this anomoly. Compared to other 2 strokes I've ridden it refuses to start when given a wristful of throttle preferring to be started like a 4 stroke with little to no gas. It idles and runs perfectly so I don't think it's down to jetting, which is set to the recommended UK spec anyway - #7 slide, N1EF needle on 3rd clip, 40 pilot and 180 main. Plug always looks fine on removal. Should I give it a whirl trying it retarded from stock?,Most 2T's will occasionally give out a SPOOOT sound when kicking over, and then fire on the next kick. If its continous its definately carburation or timing. Do you have or use the ignition map switch ? Try starting it from cold in the 'wet' setting which I think retards the timing a bit. Retarding the timing further will make it even softer power wise. Reply With Quote,,,

Posted on Nov 10, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Bike backfire

clean exhust pipe.
is it 2 strok or 4 stroke engine?

Apr 06, 2014 | 2005 Suzuki DR-Z 125 L

1 Answer

Strange noises and wont stay running

The clunking is probably just the kick back from the motor. You're hearing the compensator assembly doing what it's supposed to do.. Which is saving your crank. The whoosh sound ?? could it have been a backfiring while you were trying to start it? Once you ad stabil to the fuel and it gets in the system it will run terrible until the stabil is completely run out of the system. If you're wearing the battery down trying to start it, it will cause the kick back and backfiring through the carb too. Make sure you have your battery fully charged before trying it again.

Dec 01, 2013 | Harley Davidson FXSTB - FXSTBI Night Train...

1 Answer

Backfiring and trouble starting

If you change the exhaust pipes, you have to sync the carbs (if you cant sync them, you have to change the carb jets), usually it is backfiring because the carbs are not in balance.

May 18, 2013 | 1996 Honda VT 600 C Shadow

1 Answer

Backfiring and not wants to start now unless u lean it to the right almost to the ground

If you change the exhaust pipes, you have to sync the carbs (if you cant sync them, you have to change the carb jets), usually it is backfiring because the carbs are not in balance.

May 18, 2013 | 1996 Honda VT 600 C Shadow

1 Answer

2007 yamaha yz450f... while riding last week it was backfiring on deceleration. it blew a 5 inch hole in the header pipe. i purchased a new one, cleaned the air filter, changed the oil and put a new spark...

Exhaust leaks near the exhaust port can draw air into pipe on deceleration and detonate any unburnt fuel leaving engine, causing backfire and high temps.
An overly lean fuel mixture on the engine can make decel backfire worse too.

Mar 13, 2011 | Yamaha YZ 450 F Motorcycles

3 Answers

Backfires out the carb

clean spark plug an gap it to .025inch

if still backfiring reset timing / points

May 11, 2009 | Fiat 124 Cars & Trucks

1 Answer

Briggs and Stratton OHV V-Twin 24hp repetitive valve adjustment

Try pulling out the choke a little, if it stops backfiring the mixture is too lean, check the intake
pipes at the cyl head and also the plastic runners to the carb for leaks.
Dennis in Chicago

May 07, 2009 | Briggs & Stratton Briggs Stratton Intek V...

1 Answer

Truck backfiring willnot idle

Check your head gaskets. And your exhaust gaskets, you have blew one of the gaskets your head gasket will leak oil and your oil will look milky and watery. Your exhaust you are going to have to take off and see

Feb 07, 2009 | 1999 Chevrolet Silverado 1500

Not finding what you are looking for?
2006 Gas Gas EC 300 Logo

298 people viewed this question

Ask a Question

Usually answered in minutes!

Top Gas Gas Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4742 Answers

Gene Tuck

Level 2 Expert

248 Answers

Kim Halliwell

Level 2 Expert

35 Answers

Are you a Gas Gas Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides