Framotors Posted October 28, 2022 Share Posted October 28, 2022 Hi guys, greetings from Italy. I'm refurbishing a GSX-R 1100 H engine I got for free years ago. The previous owner told me it was used for track days and tuned up a bit, but it looks completely stock to me. I have a doubt anyway: the head plain is very low around cylinder 4-intake side (at the same level of head cooling fin) while the other side is higher, about 1,5mm more. Is it normal or is it the result of a bad machining work? Low side, same level of fin Opposite side, much higher Thank you 1 Quote Link to comment
denisd Posted October 28, 2022 Share Posted October 28, 2022 Don't look right to me, maybe there is a reason you got it for free! Quote Link to comment
Buzuki Posted October 28, 2022 Share Posted October 28, 2022 IMHO what is most important is that all four compression chambers have the same volume , so make simple test by pouring some diesel fuel or motor oil with calibrated syringe in all four comp.chamber , than notice and compare compression chambers volumes , if all four comp. chamber have the same volume than that cylinder head is OK . Quote Link to comment
wraith Posted October 28, 2022 Share Posted October 28, 2022 Looking at that head, don't think I'd use it. Quote Link to comment
coombehouse Posted October 28, 2022 Share Posted October 28, 2022 (edited) I'd measure it to be sure. Put it face down on a flat surface & a straight edge across the the cam cover surface. Measure from the straight edge down to the surface at each end with a steel rule. It will give an idea where you are. Edited October 28, 2022 by coombehouse Quote Link to comment
george 1100 Posted October 29, 2022 Share Posted October 29, 2022 You would need to check valve to piston clearance also Quote Link to comment
Framotors Posted October 29, 2022 Author Share Posted October 29, 2022 11 hours ago, denisd said: Don't look right to me, maybe there is a reason you got it for free! I guess you're right 1 Quote Link to comment
Framotors Posted October 29, 2022 Author Share Posted October 29, 2022 Thank you all, I guess it's time to take some measurements and decide how to proceed. There's also a couple of dents which makes me worry. I have another engine with lower mileage I was not willing to use cause painted blue, i think to remove its head and compare 1 Quote Link to comment
george 1100 Posted October 29, 2022 Share Posted October 29, 2022 That dent would need welding and then resurfacing....again 1 Quote Link to comment
Gixer1460 Posted October 29, 2022 Share Posted October 29, 2022 Its certainly not right! The 'dent' looks like someone attacked it with a hammer and nail! Looking at the surface there is little evidence that its been surface ground or face milled, so bearing in mind the potential deck height difference, I'd hazard a guess that someone tried DIY surfacing with emery paper and a sheet of glass, leaned on one side too heavily without swapping ends! 1 Quote Link to comment
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