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I did some parts fiche digging. The 1100G and 1100G cranks use a 31mm o.d. on the crank/big end rod pin. The GS1000 (except for the '82 GS1000S & maybe 1000G's?) use 29mm.
The big end rod bearings on the 78-79 GS1000E/C/N are 29x39x20. The 1100G and 1100E use 31x39x21 bearings. So the big end bore of the rods are the same, but the 1100's take a 1mm wider bearing.
Suzuki only lists the dimensions of the 1000 crank's rod bearing thrust washers, not the 1100's, so I cannot compare.
I'm assuming to run 1100G rods on a 1000 crank, that you would need to either find a 29X39X21 bearing and thrust washers that are 0.5mm thinner than GS1000 spec, or else run the stock 1000 bearings and thrust washers, and simply mill 0.5mm offof each side of each 1100G rod.
The big ends on the crank being larger is as much motivation for me to run an 1100E modded/hybrid crank(some 1100G parts) with 1100G rods as the motivation for me to run it simply due to the longer stroke. The price tag is quite lofty, but I don't want to have to tear down the bottom again!
This also got me wondering if it's possible to take a pair of 2 cylinder gs400/425 cranks and combine them to make a GS750 stroker crank using different main bearings than either bike originally... 60mm vs 56.4 stroke I believe...
I think I'm going to have to jump on Nick's crank offer. Brute reliability and extra torque from the longer stroke...
The big end rod bearings on the 78-79 GS1000E/C/N are 29x39x20. The 1100G and 1100E use 31x39x21 bearings. So the big end bore of the rods are the same, but the 1100's take a 1mm wider bearing.
Suzuki only lists the dimensions of the 1000 crank's rod bearing thrust washers, not the 1100's, so I cannot compare.
I'm assuming to run 1100G rods on a 1000 crank, that you would need to either find a 29X39X21 bearing and thrust washers that are 0.5mm thinner than GS1000 spec, or else run the stock 1000 bearings and thrust washers, and simply mill 0.5mm offof each side of each 1100G rod.
The big ends on the crank being larger is as much motivation for me to run an 1100E modded/hybrid crank(some 1100G parts) with 1100G rods as the motivation for me to run it simply due to the longer stroke. The price tag is quite lofty, but I don't want to have to tear down the bottom again!
This also got me wondering if it's possible to take a pair of 2 cylinder gs400/425 cranks and combine them to make a GS750 stroker crank using different main bearings than either bike originally... 60mm vs 56.4 stroke I believe...
I think I'm going to have to jump on Nick's crank offer. Brute reliability and extra torque from the longer stroke...
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