Markys Posted January 30, 2018 Share Posted January 30, 2018 (edited) Hi all just after some piston dimensions from either a gs1100 or gsx1100 piston with a compression ratio of 10:25.1 Dimensions im after is piston height from bottom of skirt to top of piston and also from bottom of gudgeon pin hole to top of piston Any info appreciated Edited January 30, 2018 by Markys Quote Link to comment
Swiss Toni Posted January 30, 2018 Share Posted January 30, 2018 Morning Markys. Welcome to OSS! Bikes? Projects? Little bit about yourself? Quote Link to comment
Markys Posted January 30, 2018 Author Share Posted January 30, 2018 Hey swiss toni Just building a custom 1984 suzuki dr250 vmx racer going bigbore, flatslide 34mm carb, ported head, custom exhaust, bigger valves etc and trying to find a high comp piston and the gsx1100 uses the same piston rings and 18mm gudgeon pin as the old dr250 so im hoping the piston is the same height except for the high comp raised profile Day job Ducati technician.... Quote Link to comment
vizman Posted January 30, 2018 Share Posted January 30, 2018 welcome to OSS.info 4 hours ago, Markys said: Day job Ducati technician.... AWESOME.....the shitters' been backed up for ages, you can take a look at it 1 Quote Link to comment
johnr Posted January 30, 2018 Share Posted January 30, 2018 take no notice, he's ex royal navy, he always tries to get newbies to look at his shitter, just keep your back to the wall......... 2 Quote Link to comment
Sheep Posted January 31, 2018 Share Posted January 31, 2018 My Dad was a former Navy man.....albeit Dutch...that explains a few things!!!!!! I do have some EFE pistons kicking about the shed,would those dimensions do you? Quote Link to comment
Markys Posted January 31, 2018 Author Share Posted January 31, 2018 Yes sheep those would help! Quote Link to comment
johnr Posted January 31, 2018 Share Posted January 31, 2018 isnt the efe little end 20mm? Quote Link to comment
Sheep Posted January 31, 2018 Share Posted January 31, 2018 Yes they are.....hence the question as to whether they would be ok but not being an exspurt I couldn't tell you if the dimensions will be of any use lol.. Any hoo here is what I have...bottom of skirt to piston top is 54.30mm and bottom of gudgeon pin hole is 37.20mm (20mm gudgeon pin)...27.20mm if you go to the pin centre. Quote Link to comment
Markys Posted January 31, 2018 Author Share Posted January 31, 2018 What year model are the efe pistons from? Quote Link to comment
Dezza Posted February 1, 2018 Share Posted February 1, 2018 On 30/01/2018 at 11:38 AM, Markys said: Day job Ducati technician.... So you have the dexterity of a gynocologist with 30 years experience and fingers like ET?(To enable the valve shims to be changed on a 4-valve head W/C engine). Quote Link to comment
Markys Posted February 14, 2018 Author Share Posted February 14, 2018 Wiseco gsx1100e piston i have got measures up the same as the dr250 piston except for the 2mm oversize and 10.25.1 comp Let the rebuild begin! Quote Link to comment
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