440 SRX Frankencrank

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WopOnTour

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I'm attempting to build a crankshaft that uses the 76-77 18mm rods on a later (79) bottom end.
Does anyone here have the "big end" measurement specs?
NOT the rod movement specs but the actual measurement.
Thanks
WOT
 

In what way is it a waste of time?
There's just more piston options for the 18mm rod.
Just wondering if there's a known rod combination.
Will look into the phaser rod, are they the correct length?
Do you know the big end specs 77 vs 78?????
TY
WOT
 
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rods are the same length big end is the same too i will have to look up the specs for ya i use phazer rods on hte gpx's and the crank pins for the 78-80 srx crank are the same as gpx and phazer but you will need to use the srx crank pin as it is longer than the phazer pin and i know that the phazer rods work on the 76 srx as well i did all the measurements when i ran out of all of my nos rods for the gpx's which have the 18 mm pin but then again i have not needed to change rods for the 76 or 77 stuff as i do not run them i use a 78 srx case and crank with the 76 and 77 cylinders as pistons are a lot easier to get (20mm pin) either in wiseco or aftermarket that is why i think it is a waist of time
 
Yamaha Nutz said:
rods are the same length big end is the same too i will have to look up the specs for ya i use phazer rods on hte gpx's and the crank pins for the 78-80 srx crank are the same as gpx and phazer but you will need to use the srx crank pin as it is longer than the phazer pin and i know that the phazer rods work on the 76 srx as well i did all the measurements when i ran out of all of my nos rods for the gpx's which have the 18 mm pin but then again i have not needed to change rods for the 76 or 77 stuff as i do not run them i use a 78 srx case and crank with the 76 and 77 cylinders as pistons are a lot easier to get (20mm pin) either in wiseco or aftermarket that is why i think it is a waist of time
Click to expand...
Thanks Nutz.
So as far as you know can I use a pair of 84-01 Phazer rods (8V0-11651) with the 78-80 SRX crank/bottom end (and I presume using the SRX bearings since the crank pin is longer)
SO
would another option be to use a pair 75GPX / 76SRX rods? (8A7-11651)

I hope either of these are true, becaue the pistons that I want to use are only available with an 18mm pin. (not a waste IMHO)

Thanks for the help
WOT

PS> I have a service manual for ther SRX but it's a bit frustrating as it doesnt list a diameter spec for the big end, just the rod side clearance (0.25-0.75mm) and rod axial play (max 2.0mm) and says if exceed "replace worn parts" lol
 
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