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altering stroke on a crank
Posted: Sun Nov 27, 2011 1:40 pm
by tavspeed
hi all,anyone altered the stroke on a crank by filling the existing pin holes,with either a 22mm plug and welding it in,or filling the holes with mig weld and re drilling and reaming out to suit the 22mm crank pin,which i would tig weld in,cheers all.
Re: altering stroke on a crank
Posted: Sun Nov 27, 2011 1:56 pm
by gaz_powell
be easier to by an eccentric crank pin
Re: altering stroke on a crank
Posted: Sun Nov 27, 2011 2:22 pm
by tavspeed
yeah i think readspeed do 62mm for about £80 quid,i could do this at work,probaly get one out to 64mm,but then you have issues with the conrod catching the casing,anyone got any knackered indian gp cranks to have a go on,cheers.
Re: altering stroke on a crank
Posted: Sun Nov 27, 2011 7:07 pm
by RICSPEED
tavspeed wrote:yeah i think readspeed do 62mm for about £80 quid,i could do this at work,probaly get one out to 64mm,but then you have issues with the conrod catching the casing,anyone got any knackered indian gp cranks to have a go on,cheers.
thats good to know ...im assuming that price is to rebuild /convert ......ill have a peek :bouncyeng:
Re: altering stroke on a crank
Posted: Sun Nov 27, 2011 8:13 pm
by carlos fandango
RICSPEED wrote:tavspeed wrote:yeah i think readspeed do 62mm for about £80 quid,i could do this at work,probaly get one out to 64mm,but then you have issues with the conrod catching the casing,anyone got any knackered indian gp cranks to have a go on,cheers.
thats good to know ...im assuming that price is to rebuild /convert ......ill have a peek :bouncyeng:
I think thats just to buy the pin
Re: altering stroke on a crank
Posted: Sun Nov 27, 2011 8:53 pm
by RICSPEED
carlos fandango wrote:RICSPEED wrote:tavspeed wrote:yeah i think readspeed do 62mm for about £80 quid,i could do this at work,probaly get one out to 64mm,but then you have issues with the conrod catching the casing,anyone got any knackered indian gp cranks to have a go on,cheers.
thats good to know ...im assuming that price is to rebuild /convert ......ill have a peek :bouncyeng:
I think thats just to buy the pin
yeah probbably
Re: altering stroke on a crank
Posted: Mon Nov 28, 2011 8:13 am
by tavspeed
yep,thats just for the pin,this is going to be a credit crunch engine,the budget is so tight it squeaks :biggrin:
Re: altering stroke on a crank
Posted: Mon Nov 28, 2011 10:15 pm
by T5-190
I seem to remember Taffspeed altering the stroke on Lambretta cranks back in the 80's. They re-drilled new holes 180' to the old crank pin holes then plugged the old holes. Just a thought.
Re: altering stroke on a crank
Posted: Mon Dec 05, 2011 9:41 pm
by grimspeed
Readspeed do up to a 64mm crank at £286.00