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Trouble Starting Hot 4Rt

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evening people.just had a great day at Scarbourgh`s Low North Park,riding the Cliff Collinson Trial,my 09 4rt didn`t let me down once didn`t miss a beat not once all day,but what I have noticed is after I have trecked to the next section stopped the engine walked the section gone back to the bike and tied to start it I will try half a dozen kicks or more to no avail I have to resort to the open the throttle full 2 kicks then release throttle to remap and then start it with no trouble,has anybody had a similar problem with there bike any suggestions would be great thanks,also I have got a new spark plug in but it happened before the new one was in thanks.

Funny mine did similar Sunday. I think I inadvertently stalled just as I kick started it or didn't start it properly. Fired once or twice then struggled with it as you described. I have winter plug in mine which seems to improve things. Also make sure in neutral and stopped on kill button. If you find anything else let me know!

I had a similar issue on my 06 bike, turned out the valvues were running too tight when the engine was hot. It started fine when cold tho. Might be worth checking them.

  • Author

hi jimmyl, what do you class as a winter plug

I had a similar issue on my 06 bike, turned out the valvues were running too tight when the engine was hot. It started fine when cold tho. Might be worth checking them.

I was going to add the same advice as John, Had exactly same experience with tight valves, ashamed to say that I had not checked them for a year or more as they so rarely change, however picked up the exhaust valves were about 0.03 tight when I checked them, adjusted and an immediate improvement in hot starting and never looked back since.

I had an 05 4RT that i gave to my lad and never had these problems. We still have the bike. I bought a nearly new 09 (It had only done 1 trial.) and have the same problems as you. The bike has done this from day one. I often have to open the throttle and kick to remap before it will start. I have never checked the valve clearances and the bike has done so little they should not need adjustment.

I have asked a few people who have owned 4RTs and the newer ones often have this problem.

Think i might be getting the feeler gauges out.

As above my valves were mega tight and it was a hooer to start. Reset the gaps and away she went, never a problem since. This was 3 rides after pidcocks had 280'd it.

I find that if I stall my '05, it can be difficult to start after.

I also had a problem recently with the throttle cable pulling out of the fitting on the hand throttle just enough to crack the throttle open even when I held the throttle in the closed position. As you know, if the throttle is open at all, the bike will not start. Check that the cable end is fully seated.

  • Author

just like to say thanks for all the feed back I got, think I will be getting the feeler gauge out is there anything I have to be careful of, regards to all

just like to say thanks for all the feed back I got, think I will be getting the feeler gauge out is there anything I have to be careful of, regards to all

It can be awkward finding top dead centre on the compression stroke, but otherwise ok to do.

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