Ole Posted September 19, 2022 Share Posted September 19, 2022 Can you folks help identify this piston. It is 73,5mm so i think a 1100 big bore kit off a kind. I might need new rings but i dont know where too look. I am about too start a project on a 79 GS 1000E. It is almost complete but in boxes, so long term job Mvh. Ole Quote Link to comment
dago Posted September 20, 2022 Share Posted September 20, 2022 Could be wiseco ? Quote Link to comment
Gixer1460 Posted September 20, 2022 Share Posted September 20, 2022 Looks like the Wiseco icon in the oval to me! Are you sure its 73.5mm? As the part # looks like 4064 which is a 73.00mm bore . . . . https://powersports.wiseco.com/k1085 If it was a 73.5 the piston # would be 4066 . . . . . https://powersports.wiseco.com/k1100 The correct rings are listed on the appropriate page. 1 Quote Link to comment
Reinhoud Posted September 20, 2022 Share Posted September 20, 2022 (edited) Total seal can get you (almost) any size you need https://www.totalseal.com/ Edited September 20, 2022 by Reinhoud Quote Link to comment
denisd Posted September 20, 2022 Share Posted September 20, 2022 (edited) It looks like 4034 to me! Correct me if I'm wrong please. I stand corrected! Edited September 22, 2022 by denisd Gixer1460 has better glasses than me Quote Link to comment
Ole Posted September 21, 2022 Author Share Posted September 21, 2022 I think you're right, Wiseco it is, must have measured it wrong. now i get 73mm. I have put a picture off another set i have, branded with the W, but this set have numbers on the top. By the way this is where i am with engine, see pic I have ordered new oilseals for crank and transmission and new bearings for the clutch. Anything else i should pay attention too? Quote Link to comment
Swiss Toni Posted September 22, 2022 Share Posted September 22, 2022 Have a look at the cam chain tensioner & guide for cracking. Measure camchain for stretch. 1 Quote Link to comment
Ole Posted September 25, 2022 Author Share Posted September 25, 2022 Thanks for the replays Quote Link to comment
Rsvfletch Posted September 26, 2022 Share Posted September 26, 2022 1085cc 73mm wiseco pistons. Nice upgrade. Quote Link to comment
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