I got a package in the mail today; 4 x NSR250 conrod kits.
Clearly, the crank pin is not needed, but I failed to specify that. D'oh.
These new conrods weigh 156 grams. The standard Honda conrod weighs 155 grams.
These new conrods are a bit thicker in the stem near the small end, so I suspect (I can't say for sure) they will be able to handle a bit more stress due to higher revs/heavier piston/more power etc.
The big end bearing weighs 25g
The small end bearing weighs 12g
The thrust washers weigh 6g each (total of 12 grams)
This gives a total of 205g
The big end pin weighs 176g but is not needed as it is an integral part of the crank web.
I am actually going to sell a pair of these to anyone who wants them. NZ$340 + freight each. (NZ$680 for the pair) Not cheap I know. That includes bearings, washers and bid end pin.
Now if only my man making the 2 central crankshaft webs wasn't quite so busy!
Patience.
In due course will be revealing the source for these NSR conrods ( <--click) on the new forum, just to give that site a bit more exposure.
Clearly, the crank pin is not needed, but I failed to specify that. D'oh.
These new conrods weigh 156 grams. The standard Honda conrod weighs 155 grams.
These new conrods are a bit thicker in the stem near the small end, so I suspect (I can't say for sure) they will be able to handle a bit more stress due to higher revs/heavier piston/more power etc.
The big end bearing weighs 25g
The small end bearing weighs 12g
The thrust washers weigh 6g each (total of 12 grams)
This gives a total of 205g
The big end pin weighs 176g but is not needed as it is an integral part of the crank web.
I am actually going to sell a pair of these to anyone who wants them. NZ$340 + freight each. (NZ$680 for the pair) Not cheap I know. That includes bearings, washers and bid end pin.
Now if only my man making the 2 central crankshaft webs wasn't quite so busy!
Patience.
In due course will be revealing the source for these NSR conrods ( <--click) on the new forum, just to give that site a bit more exposure.
Hello , Im building a NSR250 R6K mc-18 SP (1989) out of parts from Japan
ReplyDeleteIve been using your mate Gary at GTrading too pick up all the parts from Japan Yahoo. They are yet too ship ,hopefully towards the end of the month.
The purpose of this bike is too race Period 6 Historics in Aus
Im pretty sure I will need a crank at some stage if not straight away !!
Ive followed your progress off and on , and look forward too a discussion on performance Improvements ..Kind Regards Campbell