Joined Jun 2007
4K Posts | 1K+
south east WA Australia
Joined Nov 2001
17K Posts | 774+
Ely, England
i have you and weed to thank for the idea. i figured before you shove all that weight opposite the big end it might be best to try and get the weight right down.....
glad you answered bushie, i was beginning to think we had become technically illiterate.
i need to ask around too - but who to ask hey!
regards
Taffy
glad you answered bushie, i was beginning to think we had become technically illiterate.
i need to ask around too - but who to ask hey!
regards
Taffy
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
allong the same lines maybe go to the pork chop setup too
I love this link
http://ktmtalk.com/index.php?showtopic=293702
anyone who has the patience to mirror polish these things has more tinkering time to spare than me
look in Ben ballards blog in this entry "Custom Pins, Babbit-Bearings and MMC – December 2005
April 30th, 2008"
looks like he might have some hollow 35mm pins he doesn't need
anyone know for sure if the 09 berg mains are 72mm OD ball like the 530 ?
if they are 72OD a 610 big bore kit on the 570 should be a very solid upgrade, the stroker kits in the link are using 6206s (62mm)
BTW re the roller mains failure note the location of the spalling in the journal... hard up against the inner lip.
if someone has a failed roller bearing journal where the spalling is not located hard up against the inner lip Id very much like to see a picture
I love this link
http://ktmtalk.com/index.php?showtopic=293702
anyone who has the patience to mirror polish these things has more tinkering time to spare than me
look in Ben ballards blog in this entry "Custom Pins, Babbit-Bearings and MMC – December 2005
April 30th, 2008"
looks like he might have some hollow 35mm pins he doesn't need
anyone know for sure if the 09 berg mains are 72mm OD ball like the 530 ?
if they are 72OD a 610 big bore kit on the 570 should be a very solid upgrade, the stroker kits in the link are using 6206s (62mm)
BTW re the roller mains failure note the location of the spalling in the journal... hard up against the inner lip.
if someone has a failed roller bearing journal where the spalling is not located hard up against the inner lip Id very much like to see a picture
yeah sounds like a great idea to me if its at all possible.
i thought the reason they went to a 3mm bigger pin & 2mm shorter stroke,was because the rod wouldn't clear the case at the bottom? hows that gonna work?
bushy,maybe i see it wrong but spalling to me means the roller or balls running surface that has been completely worn out.my 1st mains failure(2 ball set up) was because of spalling,quite simply it should have been pulled down sooner.when the ball bearing mains had spalling it sounded like a worn out water pump in a car motor.it was that sort of sound,no knocking but just noisy bearing noise.
i take it the 550 you bought that had a mains failure,i bet would not be because of spalling.
knocking the shoulder off a roller main is a design fault or Assembly fault not spalling of the running surface.
the 2nd mains failure i had had no spalling on the running surface of the roller or bearing inners,lucky enough the big chunk that broke away fell in between the rollers & the motor locked completely up when i went to restart it.
.weed..
i thought the reason they went to a 3mm bigger pin & 2mm shorter stroke,was because the rod wouldn't clear the case at the bottom? hows that gonna work?
bushy,maybe i see it wrong but spalling to me means the roller or balls running surface that has been completely worn out.my 1st mains failure(2 ball set up) was because of spalling,quite simply it should have been pulled down sooner.when the ball bearing mains had spalling it sounded like a worn out water pump in a car motor.it was that sort of sound,no knocking but just noisy bearing noise.
i take it the 550 you bought that had a mains failure,i bet would not be because of spalling.
knocking the shoulder off a roller main is a design fault or Assembly fault not spalling of the running surface.
the 2nd mains failure i had had no spalling on the running surface of the roller or bearing inners,lucky enough the big chunk that broke away fell in between the rollers & the motor locked completely up when i went to restart it.
.weed..
Joined Nov 2001
17K Posts | 774+
Ely, England
pork chop crank, polished, billet Ti rods. and that was the late 80's..........
weed
i have a pair of 32 and 35 rod assemblies here and from the centre to the bottom edge of the rod is the same for both so as long as the stroke isn't increased the rod will miss the base of the case.
next Q? the concave '06s are 1mm shorter in the squish than the flat tops, so if i was to fit a 470HC domed it would have at least 2mm of squish.
so when i bore that big end out what do you reckon to extending the stroke by taking the 3mm all out the farthest side? or .5 and 2.5mm?
makes the rod 1.5mm nearer the cases, adds 1.5mm to the stroke, allows me to machine up to .5mm off the piston squish for that touch of perfection....
to be honest you can kiss out the bottom of the cases nnnoooooooo problem for at least 1-2mm i reckon.
opinions?
regards
Taffy
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
taffy that sounds awesome if its gonna fit, what about the piddly thin bit of ally twixt gearbox and Ccase?
ohh yeah thast the stuff maybe need to weld the pin perhaps, if going out further its got less material surrounding it, what CC is it gonna end up at? use a JBS 105mm liner too ?
weed I put my bearing bollocks in the mains thread
the mad welshman is building a proper bigun ! im impressed allready
ohh yeah thast the stuff maybe need to weld the pin perhaps, if going out further its got less material surrounding it, what CC is it gonna end up at? use a JBS 105mm liner too ?
weed I put my bearing bollocks in the mains thread
the mad welshman is building a proper bigun ! im impressed allready
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
that makes theories like fartssomeone elses might sound impressive but for some reason they all stink worse than your own.
is this a project for you to ride taffy? it should sound better than the 400 at least
Joined Nov 2001
17K Posts | 774+
Ely, England
no its for the sidecar team i help. but it's all theory at present. they are in france waiting to do a big international on thursday evening. i'll discuss it with the 'team' when they get back. can't have me shoving "unreliability" on them now can we!
maybe i'll walk before i run! but i do have a spare 82mm crank sat here.
regards
Taffy
maybe i'll walk before i run! but i do have a spare 82mm crank sat here.
regards
Taffy
just wondering taffy,what is the weight comparison between the 628 & 644 cranks,any idea?
..weed..
..weed..
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