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Downpipe removal....Snapped things.... - Printable Version

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+--- Thread: Downpipe removal....Snapped things.... (/showthread.php?tid=72010)

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Re: Downpipe removal....Snapped things.... - anutz - 03-04-15

well, i tried to remove it and its sheared off flush with the head...


I don't think i can get to it to drill it properly....


What about taking the head off the engine......

Re: Downpipe removal....Snapped things.... - red98 - 03-04-15

Be easier to remove front wheel and forks......if you remove the head you'll need a new gasket,£30 when I last bought one.....

Re: Downpipe removal....Snapped things.... - anutz - 03-04-15

yep i thought of that once i posted - so thats my next job Smile....what a nightmare!

Re: Downpipe removal....Snapped things.... - fazersharp - 03-04-15

AHHHHHHHH !!!I warned you TWICE  :\


Quote:So yes they are called rivet nuts and you do have to drill the clamp hole wider to acomadate them, or use sleave nuts or stud extender like has been mentioned. I would not risk getting the stud out, consider the snapped nut a warning
Quote:Yeh thats the one !!, if the fella does that then he does not run the risk snapping the stud trying to get it out.


Its just from knowing myself, I have learnt with things like these that I am Frank Spencer and I know that I will beak it.

Sorry fella  :'(

Re: Downpipe removal....Snapped things.... - Paulfzs - 03-04-15

(03-04-15, 03:43 PM)anutz link Wrote: yep i thought of that once i posted - so thats my next job Smile ....what a nightmare!


which cylinder is it on?


on mine in the pic above it was #2, looking at it head on its 2nd from the right and i know you can get to both bolts on the middle 2 with a drill just takes a bit of origami with the drill to get it in.


failing that as above remove the forks

Re: Downpipe removal....Snapped things.... - anutz - 03-04-15

i wish i had listened to you Fazersharp...but i thought "i will be gentle...it will be ok....." it was not...i was not being rough with it, they just are so brittle!


Trying with a stud extractor kit now and then will give up and see about drilling it out completely.....


Paulfzs - its the 2nd cylinder so to the left of middle when sat on the bike.....just not enough room for my drill as wheel etc in the way


Can't stop laughing!


:rollin







Re: Downpipe removal....Snapped things.... - sinto607276 - 03-04-15

(03-04-15, 04:36 PM)anutz link Wrote: Paulfzs - its the 2nd cylinder so to the left of middle when sat on the bike.....just not enough room for my drill as wheel etc in the way


Can't stop laughing!


:rollin

But surely anutz is a lot easier to remove the front end as apposed to the removal of the engine?

Re: Downpipe removal....Snapped things.... - anutz - 03-04-15

OK so managed to wangle my way in with without the wheel having to come off, no luck with the stud extractor


SO im stuck now - either i mess around drilling it out and then tap it ( i have never done that, and have no kit i.w. tap and die )


Or i take the head off and take it to a shop to get sorted ( never taken the head off either but i can see disconnecting things might be easier than working on the bike as it is - on its center stand


Any other ideas or advice





Re: Downpipe removal....Snapped things.... - sinto607276 - 03-04-15

I think you can hire tap and dye sets, maybe from HSS Hire or somewhere like that, maybe worth trying your local yellow pages?
Where abouts are you anutz?

Re: Downpipe removal....Snapped things.... - Paulfzs - 03-04-15

surely someone on here will have a set you can borrow.


drilling isnt hard tbh, it took me about an hour to drill mine starting at 2mm going up in .5's just be gentle dont snap the drill bit.


taking the head off you need to take the engine out, took me 2 days to get mine out lol theyre a pain!!


then itll be £100000000000 to get it drilled out.


do it yourself in under 2 hours no problem

Re: Downpipe removal....Snapped things.... - anutz - 03-04-15

i shall get may hands on a tap set, and will set to work drilling and tapping at some point next week....


already have some M6 Stalin less Steel rod and Nuts





Re: Downpipe removal....Snapped things.... - Paulfzs - 03-04-15

centre punch in the middle of the snapped stuf then start with a tiny 2mm and work up, dont rush it! do not push hard!!! if you snap the drill bit itll be a bugger!


expect it to take an hour so chill.

Re: Downpipe removal....Snapped things.... - anutz - 03-04-15

thanks Paulfzs...


So its going ok, i have worked up to 5m diameter and 10mm depth...


I have stopped as i need to know


1. How deep do i go, i have no orignal studs to compare to
2. What diameter do i drill to, so i can then tap


I know the tap pitch i use depends on the rods i have, they are M6 from Screwfix but i need to measure the pitch etc


Thanks for your help ( all...)


[Image: IMG_0352_zpsexai2ecx.jpg]


Smile

Re: Downpipe removal....Snapped things.... - Paulfzs - 04-04-15

id say about 10mm depth is fine, i drilled mine till it went all the way through and had no resistance as the stud obviously wasnt all the way to the end of the threaded part.


tapping a 6mm thread into a 5mm hole is fine.

Re: Downpipe removal....Snapped things.... - anutz - 04-04-15

Thanks


Have done some practice drills and taps on a block i had, went well....so no concerns there, got a kit from screw fix, not the best in the world but good enough and has M6x1.0 and M6x0.75 tap drill bits




http://www.screwfix.com/p/carbon-steel-tap-die-set-51-piece-set/11449


Have almost done getting the head off and out the bike, no way i could get my tapping tools in the space i had, might be possible for some but i decided against it..no matter what i did i could not get access with the tap bit and handles...


I have the week off work, and i knew the carbs potentially had blocked pilot jets so i figure i may as well just go for broke


Just undoing the cam shaft covers....only the one thing i am not sure of is do i need to disconnect ALL the cables in the cable box and move them so i have room, but i suspect once i have the head cover off and cams out i will be ok


Anutz

Re: Downpipe removal....Snapped things.... - bandit - 04-04-15

Just a thought & I maybe wrong, but if the stud you are drilling out is 6mm would it not be better to tap a 8mm thread into the head,so purchase a 8mm to 6mm exhaust stud of the required length & correct thread pitch.

http://www.ebay.co.uk/itm/Motorcycle-exhaust-Stud-8mm-To-6mm-50mm-Long-/130644495868?pt=LH_DefaultDomain_3&hash=item1e6b04cdfc

Re: Downpipe removal....Snapped things.... - Paulfzs - 04-04-15

i just took the cables out the black box then lifted the whole loom up as high as i could get it and cable tied it to the crossbar when i took my head off for inspection.




i can't help but think youre being a bit ignorant with advice.


youve ignored it a few times now, rather than removing the head i would have got a decent tap set that accepts a ratchet and extension bar like i did.

Re: Downpipe removal....Snapped things.... - anutz - 04-04-15


OK so - ignoring advice, the reason i wanted to try and get the studs out was that i intend to order a new set of down pipes, and did not fancy having to drill their clamps out - in hind sight it might have been easier.....but its always 20/20


regards getting the extension bar - good idea, but i already have the head off now....and its a lot easier with it on a bench then lying on the floor in a cramped space


i have much less experience than most on here, only had the bike about 3 months.....had no idea how an engine really worked until i started learning a few months back, so for me i am pleased i have taken it off and am making progress  Smile















Re: Downpipe removal....Snapped things.... - red98 - 04-04-15

Yep me too....extension of some sort, even if you have to make one yourself  Wink.........that said.well done for tackling this yourself, alot of people would have given up by now, you can remove the cover without touching the electrics, its tight but doable, are you going to re-grind the valves whilst the heads off ?

Re: Downpipe removal....Snapped things.... - anutz - 04-04-15

thanks....  Smile


will not pretend to know what re-grinding the valves means - but before i re-assemble i shall make sure i have read up on what needs to be considered


i was thinking that if i am just going to put it back together i should not need to do too much else, aside from checking clearances and timing etc...