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Degreeing cams on GS700

  • Thread starter Thread starter Nicholaschase29
  • Start date Start date
I think I want to retard my exhaust cam ~7 degrees or so from stock and retard my intake cam ~3-4 degrees. This will increase overlap. This would put my intake center almost exactly where it is now and move the exhaust center up to around 117. These number seem off from what you all have been describing; Am I overlooking something?
 
I adjusted the intake cam this past weekend with my brother. We removed the cam after measuring the cam centers. We were able to determine we needed to remove 1.1mm on the trailing edge of each hole on the cam gear in order to get the centers where I want them. I was actually measuring the exhaust cam incorrectly and it is actually retarded ~3 degrees. I left the center at 107 because I figure it will have a little more of a scavenging effect by pulling the intake charge through the cylinder at the top of the exhaust stroke. I proceeded to set the intake cam at 108 degrees and it ended up being 108.5 when It was all said and done. I actually ended up with a 114 center if i were to move the gear to its full range. By moving it there and turning the engine over i did not experience any interference so I think I should be good. When the engine is hot and the valves stretch a little I may have problems but that's at 114 and I'm at 108.5. I locktighted the cam bolts and torqued everything down and I'm on my way. I put the stock carbs back on the bike (I had gs 34mm carbs on) I'm waiting to do any serious jetting until I get some 34mm gsx-r carbs.....(anyone have any?) Thanks for your help guys. The bike seems to really start to pull at 6500rpms and then again it hits another powerband around 7600 or so it seems but the bike is not jetted right at the moment.
 
rapidray said:
Do NOT guess! Move it & recheck with the degree wheel. Make SURE you know where it ends up. I wouldn't set the intake any more than 108. I have done enough of this (and dynoed them) to know what works. You need to remember something,this is NOT a DRAGBIKE! You will be spending most of your time riding in the midrange. If your bike has all of the REAL power from 8-10000 RPM you will find yourself re-doing this. I applaud you wanting to do this but think realistically about where the engine will live most of it's run time. Ray.
Click to expand...

I thought they all were Ray... What gives???
 
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