Miss fire that clears at higher revs

[shanered6]

Shannered, feeling for you. wish i could help. such a brilliant bike normally. the dyno seems a good idea. i couldnt stand it, id sell and get another. have had bikes, cars, lawn mowers , whipper snippers in same boat. threw away, not worth the head hurt, sleepless nights etc.

its just realy strange it was perfect called in at the garage filled up 5 miles up the road it started and been like that since my first thoughts were it was low on fuel so its dirt or water or bad fuel , im just thinking its something very simple its just a case of finding it and the big problem is ..... IM BLOODY STUBBORN and wont give up till i find it or it ends up in the back of the shed covered in dust !

[KiwiCol]

Drain the tank & bung it in your car. Put a fresh 20L in (95 or 98) via a Jerry can.  Worth a crack.

[KiwiCol]

Only saying this as you've said 'it started after filling up' at the local servo.

[Mick_J]

Drain the tank & bung it in your car. Put a fresh 20L in (95 or 98) via a Jerry can.  Worth a crack.

I've tried that twice Col, still no change.

[KiwiCol]

Bugger isn't the word then.

[shanered6]

Bloody yeeeeeeeeeeeeeeeeeeeeeeeeeeeees !!!    ...... the 14 is running mint again and back to its smooth as silky power , changed plugs and air filter and hey prestow !! spot on !!
Right the air filter was new when i bought the bike and has only done 600 miles but it was definatly the problem , the new one ive bought is completely hollow inside , the one that came off had a tube that sank 3/4 of the length of the filter from the hole in the top and i think it was restricting the air flow .
And i think they were also the original plugs from new judging by the rust on them but the spark was still good , so if anyone else is having this issue just check your air filter and see which one you have fitted and if in doubt take the filter out and just try running the bike with out for a few minutes and see if it helps !

[seth]

Glad you finally got to the bottom of your problem.


If you can post a pic of the offending air filter it might help others .

[Notty]

Yippeeee 

[Del]

well done that man 

[KiwiCol]

That's so bloody good you tracked it down & found it. Great news.   

[shanered6]

I will get some pics sorted to show the difference between the two , to be honest i wouldn't of found it as i knew it had a new one when i bought it but i thought oh well if i get another one i can discount it and at least i'll have a spare .
i suppose the plugs may have had a part to play but im convinced the fliter was the main culprit , but anyway im over the moon and it looks like stubbonness won out !! 

[seth]

Glad you found it tho.
Bad plugs can cause all sorts of bother .
Hopefully this good weather lasts so you can get out and put some miles on it
 

[shanered6]

Ye i did 120 miles this afternoon going to Elgin and back and it ran fantastic  , its bloody tiring to ride when its lurching and stalling especially two up nearly put Lisa off going on the bikes altogether .

[Kiwifruit]

Good news...... riding something not running 100% is no fun. Well done. 

[Hooli]

Nice find, dodgy pattern air filters seem rather common. No idea why are they are pretty simple things.