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Posted by Troll
- April 15, 2015, 18:13:23 PMI've been thinking about this, and 1, I don't believe there is a rev limiter on this engine. The redline is 5,900....but this is not about that, since it would be much easier to hit the limit in 1st...Now..some seemingly unrelated questions...How well and accurately does it shift? Is there any funny noise related to this problem? Do you still have the heel portion of your shifter installed? What I'm getting at is there has been some indication that the early models had an issue with 1-2 shift forks. I know mine had a few teeth knocked off the cluster gear, and a bent 1-2 fork when I bought it. It would hop out of 2nd and slam back in under a load....Just a thought....Like the old joke: "Doctor, it hurts when I do this"...Doctor: "Stop doing that!"
Posted by Bucko
- April 15, 2015, 17:30:09 PMI think the rev limiter kicks in at about 5k but not certain of the exact number.
The ECU is located under the seat beside the battery. Easiest to remove the battery first to get at the ECU.
I've had an ongoing issue with the female connector pins breaking - easily spotted by looking closely at the 'mouth' of the female pins.
Posted by shunter v8
- April 15, 2015, 06:10:41 AMThanks guys, i would say it happens at RPM rather than mph, and only in 2nd gear, i tried to get it to do it in first and third but it did not do it. where abouts is the ecu located and i will have a look at the connections. It has not reved out enough for it to be the rev limiter as it happens fairly quick after hitting 2nd gear.
Posted by Bucko
- April 14, 2015, 23:08:30 PMSounds similar to what I feel when I hit the rev limiter - is it possible you're hitting the rev limiter only in second gear? It wouldn't be weird that you cant go fast enough to hit the rev limit in 4th and 5th, but I would think you should be able to hit it in 3rd (and for sure in 1st & 2nd 
Or, could be your ECU is not measuring RPMs properly. Check the ECU connector pins - That's been a trouble spot for me.
Posted by holycow
- April 14, 2015, 22:32:41 PMLook closely- does it always happen at the exact same speed (not rpm but mph)? Hmmm... or something slipping inside the throttle body...?
Posted by greenbarn
- April 14, 2015, 17:10:43 PMThat is weird.... So just skip second gear... 
Posted by Troll
- April 14, 2015, 17:07:08 PMI gotta think about this...weird
Posted by shunter v8
- April 14, 2015, 15:59:38 PMYes only second gear. That's what I find so strange about it.
Posted by Troll
- April 14, 2015, 15:44:16 PMThis is ONLY in 2nd gear? Very strange...
Posted by shunter v8
- April 14, 2015, 14:07:52 PMOkay latest update,I had two of these light up spark plug caps so I changed them for two NGK ones I had in the garage and took it a spin. Unfortunately it's exactly the same I will try and explain the symptoms better. I got the bike warmed up and did a standing start,first gear under hard acceleration no problem,second gear starts pulling then it's like hitting a very bad flat spot then getting full power back and then it does the same again almost straight away we are still in second gear,third,fourth and fifth gear all fine under hard acceleration. It has vance and Hines on it which I thought may have been the culprit,I had to get the bike government tested when I bought it and I had to put an original exhaust on it then and it was still the same.
Posted by shunter v8
- April 14, 2015, 08:58:36 AMok thanks, i will start with plug caps then. The surge is quite dramatic like bike is being tied to a post and you are giving it throttle to try and go and then someone cuts the rope. it really is quite scary epecially 2 up.
Posted by Troll
- April 14, 2015, 08:46:02 AMQuote from: shunter v8 on April 14, 2015, 06:53:25 AMThanks all for your input. To start with the bike had new plugs filters etc about 2.5k miles ago, the bike came with plug caps that light up when the engine is running, i dont know if they are a possible cause of the fault, what suprises me it is only in 2nd gear and under hard acceleration. Greenbarn my definition of surging is it starts pulling smoothly but very quickly the power comes in with a bang and it does this twice while in second gear, i suppose to put it another way it feels like a blocked jet has just cleared its self and you are getting a rush of petrol through. Thanks for all your help.
I don't know how they are where you live, but those light up plug caps cause a world of problems here, in the States. JUNK...not meant for anything but show and trailer queens! I know what Greenbarn is getting at about a symptom description...A surge is like sitting in a rocking chair....back and forth, back and forth, or perhaps the feeling you get when riding into a headwind.
Posted by John Hopkins
- April 14, 2015, 07:53:06 AMAnother thought is that you could drain a pint of gas to check there isn't water in it.
John.
Posted by shunter v8
- April 14, 2015, 06:53:25 AMThanks all for your input. To start with the bike had new plugs filters etc about 2.5k miles ago, the bike came with plug caps that light up when the engine is running, i dont know if they are a possible cause of the fault, what suprises me it is only in 2nd gear and under hard acceleration. Greenbarn my definition of surging is it starts pulling smoothly but very quickly the power comes in with a bang and it does this twice while in second gear, i suppose to put it another way it feels like a blocked jet has just cleared its self and you are getting a rush of petrol through. Thanks for all your help.
Posted by greenbarn
- April 13, 2015, 22:18:04 PMShunter, what exactly to you mean by "surging"- I've had different people mean different things from using that word.