Originally posted by bclapham
sage...long time no hear! :)
Originally posted by EricGorr
back in the mid-1980s we were buying up old Honda NSR 250 cranks and stripping them down for the 110 mm rods so we could fit them to CR125s.
EricGorr said:Theres a lot of other factors to consider when installing a long rod kit, spacer plates for the base and modifications in port timing are needed.
One common myth is that a long rod changes the displacement of the cylinder, but it actually it increases the crankcase volume. Some tuners like the guys at Honda stuff the crankcases with epoxy to compensate for the volume added by the longer rod.
Its not for everybody and it takes a lot of planning to implement a long rod kit effectively.