crazypj said:I wouldn't worry about any external rust on crank, it's the bearings that will fail if there is even slight rust on the races.
Just put it together and keep an eye out for a crank.
You should bash some dents under back of tank so it fits a bit more level (or raise front?)
Bike looks bent with tank pointing down at front
crazypj said:As long as the small end is good no need to worry about things.
Burnt isn't a bad thing, it's just the oil overheated and will prevent rust forming.
The rods are copper plated so the entire thing doesn't get hardened when they are heat trated on bearing surfaces
Wee Todd said:I can't count how many brand new cb250 head gaskets went into the garbage(athena supplies two )I would be tempted to swap cylinder,pistons with cb 350,,,,,,but I don't know if the top case is bored large enough to accept the 350 item..... cb250 was very popular in the UK,,not many made it to NA.................Good Luck
Green199 said:I thought the 250 was an almost identical motor to the 360, not the 350?
crazypj said:There are two variants of 250, the CB350 based one and CB360, completely different motors.
Some countries had capacity limits, it's easier to use same crank with smaller pistons
It was done by Ronald Regan when HD couldn't compete in the 80's, that's why USA had 700cc motors for a few years when everyone else had 750's
Sonreir said:If you do get the cases blasted, try to use soda. Other types of media can get stuck in oil passages and that's never a good thing.
Also, give everything a good wash after it's blasted.
crazypj said:K4 is 350 variant, G5 is 360 variant
Easy to tell which is which, 350 variants have separate cam bearings bolted to sides of head on both sides with chrome covers.
All 360 variants have no removable part on right side and 'finned' alloy points cover
You have 'small' 350, 360 also has an extra bearing on cam (K4 only has bearings on the ends)
Also, the CB360/250 based has a gear driven trochoidal oil pump, not a plunger oil pump.crazypj said:K4 is 350 variant, G5 is 360 variant
Easy to tell which is which, 350 variants have separate cam bearings bolted to sides of head on both sides with chrome covers.
All 360 variants have no removable part on right side and 'finned' alloy points cover
You have 'small' 350, 360 also has an extra bearing on cam (K4 only has bearings on the ends)
mydlyfkryzis said:Also, the CB360/250 based has a gear driven trochoidal oil pump, not a plunger oil pump.