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+--- Thread: Rusted now rounding bolt on powervalve (/showthread.php?tid=79673)
Rusted now rounding bolt on powervalve - JD-LincsUK - 14-05-18
Hi Guys
I'm a bit concerned about the bolt holding the powervalve cover in place on my bike.
Last year I had problems with the YPVS fault 'code' appearing on my tacho - so I adjusted it and lubed everything up, went pretty well. I had to renew the pulley because it was in really shit state - and I mean that - worst working part I've seen on any running bike. I wanted to take the cover off and check the actual valve flap operation and clean if ness, but this one bolt head was rusty and the bolt started rounding - it was crazily overtorqued. I left it, rather than cause damage that would affect the valve access. Was hoping a friend would sort it for me, but so far it hasn't happened.
After the error code started appearing again recently (sorted now, though, with tightening of the cables) I really want to get inside that valve housing and check it over.
Would I be okay just cutting a slot into the bolt head and using a large screwdriver to unscrew it (my usual method) or is it a really long one that would be difficult to remove this way? Really don't want to end up having to drill it.
TiA
Re: Rusted now rounding bolt on powervalve - robbo - 14-05-18
I'm out of the country at present but if you search my posts I've posted the length/dimensions of all the necessary exup bolts. I do hope you don't have to resort to drilling it out. Good luck
:thumbup .
Re: Rusted now rounding bolt on powervalve - Hugh Mungus - 14-05-18
From what I remember they aren't that long. If you can cut a slot into the head it is always worth trying, or hammer on a slightly smaller socket - sometimes using those old Whitworth Imperial size sockets can help as you can get some which are half a mm smaller, always worth a go.
I really hope you don't have to drill but if you do then please use a decent drill bit because it will save on all that swearing that I used to shout when I used cheap drill bits!
However... Mine were OK to get out - only to find the ones underneath the cover for the EXUP valve were totally shot.
Re: Rusted now rounding bolt on powervalve - PieEater - 14-05-18
The sizes of the bolts are in the FAQ.
Re: Rusted now rounding bolt on powervalve - JD-LincsUK - 15-05-18
Thanks a lot for the advice
