October 28, 201213 yr My 4rt is getting to be a pain to start when it's warm. From cold it will start on the 1st kick virtually every time but when it's warm it's hard going. It's only 14 weeks old, the air filter is spotless as is the plug, I only use good fuel not supermarket rubbish and the tick over if anything is a bit on the high side. When it does fire up it struggles to pick up and then dies, I kick it over slow with full throttle to reset it and this doesn't work but like I said when it's cold, first time Any thoughts?? Andy
October 28, 201213 yr Put the idle speed to 1900 rpm, throttle closed and softly kick down.... German Munster
October 28, 201213 yr Have you checked the valve clearances since owning it? It should start when you reset the throttle, if it's not, then something is definitely not right, 12 weeks old, take it back to your dealer and let them check it over. Just a few ideas, are you slightly opening the throttle when kicking it over, take your hand of the twist grip and hold the inner bar. Don't jab at the kick start, one slowish kik to the footrest and hold a second before taking your boot off. Edited October 28, 201213 yr by jj65
October 28, 201213 yr Author Yea did the valve clearances jj, not touching the throttle and kicking like you say. I'll stick a new plug in tomorrow and a new filter although they both look spotless. It just seems a bit strange that it starts perfect when it's cold
October 28, 201213 yr Mine doesn't always start first, second or even third kick when hot, sometimes, but a throttle reset results in a guaranteed start. The more hours on the engine the better, but as you say, could be as simple as a new plug, (I think I'll bung a new one in too). Electrics, it's witchcraft I tell yah :0)
October 31, 201213 yr A tip I got from my Montesa dealer: When it's under 10°C outside, use the NGK CR5EH-9 sparkplug insted of the CR6EH-9.
November 2, 201213 yr Author Thanks Guys, I spoke to the dealer and he said the same about the plug, failing that they said they'll have it back and have a look, I hope the plug does it as it's a 700 mile round trip to the dealers
November 12, 201213 yr Author Just an update, put in a number 5 plug and it's starting perfect. I did try a new number 6 plug that I already had just incase it was my original plug but it was the same but the number 5 has done the trick
November 12, 201213 yr Just an update, put in a number 5 plug and it's starting perfect. I did try a new number 6 plug that I already had just incase it was my original plug but it was the same but the number 5 has done the trick Glad to hear things are sorted - wonder if anybody can explain the logic in this though as your issues was hot starting which you would think would not be that weather related. My 09 went a little this way but spent a day cleaning all electrical connections, cleaned out throttle body bore and tickover port and also a new std plug and seems better. May try the alternative plug if things start to deteriote again.
November 12, 201213 yr Author Glad to hear things are sorted - wonder if anybody can explain the logic in this though as your issues was hot starting which you would think would not be that weather related. My 09 went a little this way but spent a day cleaning all electrical connections, cleaned out throttle body bore and tickover port and also a new std plug and seems better. May try the alternative plug if things start to deteriote again. Yes it is strange Jimmy, I have to admit I don't understand how this sorted it out but thankfully it has and saved me a very long trip to the dealer. A friend of mine who sells and repairs bikes is baffled by this too, he reckons if anything it should be harder to start
November 21, 201213 yr A NGK CR5EH-9 sparkplug is "hotter" than a CR6EH-9 and therefore better suitable in colder conditions. It's as simple as that I think http://www.ngksparkplugs.com/tech_support/spark_plugs/p2.asp
November 28, 201213 yr Author A NGK CR5EH-9 sparkplug is "hotter" than a CR6EH-9 and therefore better suitable in colder conditions. It's as simple as that I think http://www.ngksparkp...rk_plugs/p2.asp Yea I know what your saying Guys but what doesn't make sense is the fact that when the bike is cold it starts first time, it's only a problem when it's warm. A warmer plug should help when the engine is cold but the problem is or should I say was, when it was hot. It's all sorted now though, that's the main thing
November 28, 201213 yr problem starting is normally only an issue with a "HOT" motor, But my 06 4rt has never missed a beat (touch wood). glad you are sorted
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