- Nov 13, 2001
- 1,173
- 0
:uh: Well it's winter time and I tore my topend off this week and found out everything was in great condition tho the powervavles and guide were carboned up im guessing from the previous owner running Honda HP2. Cylinder is std. plated bore with OEM piston in it. Bike had about 200HRS+ on the topend I'n guessing ( about 50 from me and the previous owner had the bike for a year ). Bike had about 125PSI of compression but my compression tester isn't accurate cause some air does leak out of the plug hole but 125PSI with a leak sounds good. First off the cylinder head looks brand new to the naked eye but up close with a magnifying glass you can see very small nicks most likely from low octane gas but has no visible marks on it. Powervavles need cleaning also. Cylinder bore looks perfect, no scratches at all in the plating, you can still see most of the cross hatch pattern in there. Piston looked great, no scratches in the piston, piston top looked like this:
But I noticed some but not alot of blowby near the ring area and the end of the ring were worn. Under the piston I found a hot spot:
So from what it is saying the first picture says my bike is jetted correctly but the hot spot means it was running lean ( i know my water pump is working )? I have had some jetting problems lately with it but I am running a 170 main (172 stock) 55 pilot (58 stock) N1470S (N1469S stock). Should I worry about this before I put my new Wiseco topend in it? Thanks for any help :uh:
BTW: it has FMF Fatty pipe, FMF says to run a 58 pilot so i switched to it and a N1468S needle which my bike has 2 sizes bigger.Boyesen Power Reeds also which say to go 1-3 down on the main. I put my clip in the 2nd position from 3rd so maybe that will help.
But I noticed some but not alot of blowby near the ring area and the end of the ring were worn. Under the piston I found a hot spot:
So from what it is saying the first picture says my bike is jetted correctly but the hot spot means it was running lean ( i know my water pump is working )? I have had some jetting problems lately with it but I am running a 170 main (172 stock) 55 pilot (58 stock) N1470S (N1469S stock). Should I worry about this before I put my new Wiseco topend in it? Thanks for any help :uh:
BTW: it has FMF Fatty pipe, FMF says to run a 58 pilot so i switched to it and a N1468S needle which my bike has 2 sizes bigger.Boyesen Power Reeds also which say to go 1-3 down on the main. I put my clip in the 2nd position from 3rd so maybe that will help.
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