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September 27th, 2011, 05:56 AM   #1
rgl
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Hello and what is this bolt?

Hi there, first post and looking forward to learning a thing or two, hopefully contributing too!
Been snooping through some great info, entertaining arguments and the helpful owners doc (which is still index hacked since the other day) for a few months and now purchased an 05 fs650. Always wanted one of these or a husky 570smr and am happy I chose this

Have attached a photo of the LHS cylinder head as there is an M5 or 6 bolt I am concerned with, it is leaking oil from there when riding but it wont tighten up. It seems it is supposed to have a captive nut on the other side which may no longer be, well.....captive. Even the parts manual doesn't list this bolt as existing?

And me, I'm a lab-tech/toolmaker at Deakin University in Australia and looking to do the usual bit of road riding / bit of track work with the Berg. Bike is starting and running really well, only thing I'm noticing is extreme vibration at mid to high RPM, I'm talking hard to hang on. Not sure if this could be incorrect balancer timing or something. Even the husky 570smr I've ridden felt smooth compared to this.

Has a few little issues
*Raucous "straight cut" gear noise from LHS of engine (possible old vs new gear dimension incompatibility?)
*Had to mill the rocker covers flat to get a more even seal on the gaskets to stop leaks
*Starter sprauge starting to slip very occasionally
*Leaking oil from crankcase vent rubber joiner or dowels it seems
*Getting close to 60hrs so will be giving it a strip soon for a few internal mods to be safe.
Looking forward to getting this beast sorted and enjoying some hours on it

All the best,
-Rgl
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September 27th, 2011, 06:01 AM   #2
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Re: Hello and what is this bolt?

this bolt has indeed a nut on the other end, you have to take the rocker box of to get to it.
This bolt holds the timing chain tensioner blade.

Regards
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September 28th, 2011, 04:49 AM   #3
rgl
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Re: Hello and what is this bolt?

Thanks Force, that'll be it, I best be tightening that one then!
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September 28th, 2011, 11:01 AM   #4
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Re: Hello and what is this bolt?

if you want to, try removing the gear in the sprague known as the freewheel and then kickstart the bike. you should then get no noise. if so you must then buy the correct freewheel.

you must find the old nut. it's no joke!

no need to machine rocker inspection caps just stick 50% in the vice and whack with a soft hammer.

good luck though

regards

Taffy
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September 28th, 2011, 12:22 PM   #5
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Re: Hello and what is this bolt?

And the nut you're looking for is number 22 in the picture.
Hope you find it.

regards

/Nick
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September 28th, 2011, 06:54 PM   #6
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Re: Hello and what is this bolt?

FWIW the nut is not captive and mine often leaks around that bolt, needs a new alloy washer

If I know its tight enough and it still leaks I degrease the bolt/head and put RTV silicone on it.

you can just about eliminate blowby by running the cases under a vacuum, you can put a high speed air valve over the breather or add a second reed valve to the LHS case.

there are part numbers for the NAPA valves and there is a picture toward the end of the second reed valve on my bike in this thread.
viewtopic.php?f=5&t=1110

hammering a valve cap "flat" ? nothing wrong with a sheet of glass and some sandpaper.. just MHO
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September 28th, 2011, 11:19 PM   #7
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Re: Hello and what is this bolt?

do you ever shut up?

you put half in the vice and give it a tap with a "soft headed hammer".

so your head would do the job perfectly!

Taffy
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September 29th, 2011, 01:16 AM   #8
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Re: Hello and what is this bolt?

Originally Posted by Taffy
do you ever shut up?

Taffy

do you ever machine anything in house Taff ? or do you have to have "your engineer" cut your toenails as well?

if you insist on posting up how Dodgy you are out in the Pratt St garden shed with a hammer or an impact driver I'll be here to point it out and I quite enjoy the opportunity so if you want me to "shut up" you know what to do
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September 29th, 2011, 01:26 AM   #9
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Re: Hello and what is this bolt?

sorry, should have realised you need to be both skilled and a mechanic to do it.

and your neither!

you leave it well alone go play with your headgaskets - the leaky ones.

Taffy
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September 29th, 2011, 01:38 AM   #10
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Re: Hello and what is this bolt?

ok lets get our wee wees out just for giggles my trades are; fitter and turner, diesel fitter and fully qualified mechanical engineer, if you want to bash tiny bits of alloy into submission out the back in your Pratt St Wankershire garden shed cause you can't machine anything by yourself that's fine with me.

as you know the latest version of my homemade hybrid head gaskets don't leak, FWIW we're being totally immature which is kinda fun however you're loosing more customers by the minute! the thing is though i can't fault your enthusiasm sir! it is truly inspiring
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