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JimmyRigged New Member Aug 27, So I ditched all the predators and went for some gx's and I was wondering if the stage 1 hop up kit 18lbs valve springs, air filter and adapter, smaller fan, header, jet, and gaskets and governor removed would be a decent up grade and I need anything else or if anything else is suggested I get?
Also I have 11" slicks with a 72 oth sprocket and 12 tooth clutch so I have great lower end but I want more top speed that's the reason for the mods please give me your inputs. I left out that it also comes with 8 degree timing key and choke holder. Last edited: Aug 27, Newoldstock New Member Aug 27, No Jimmy. Its not much of a kit. Its just a very thin handfull of parts. First thing you need to do before you buy is a billet flywheel, billet rod and a good Honda piston.
Then the engine will be reliable and strong, add a filter jet kit and header Then add the springs. Knowing from the beginning that the valve train in this style engine is there weakest point, I changed over to roller rocker arms.
I run Gage 1. A combination of aluminum "Gage" rockers and cast aluminum valve "Aussie Speed" cover deaden the sound. I do run tighter tolerances valve settings because of this,. With added air shrouds on the head it cools better so less expansion. Amazing what a piece of tin and a bolt can do.
All said, mine runs very very quiet compared to the first time it ran. Further notes on valve train. Being Ray I changed to the then sold by VC billet stud mounted 1.
That really quieted the ting ting valve train noise. VC then posted that the silver hd springs had issues with coil bind on anything but stock lift cams and recommended going to the gold comp cams version.
But I continued to run the silver spring set up for about hours until my tear down. This was to change to the torque cam and replace the cast rod with the VC produced billet rod. The only issue I seen was the guide plate for the push rods was sort of ovaled out from wear. Sho was doing his lifan near this time so I advised him to look at his guide plate.
It showed a similar issue. We both switched to the NRracing shaft mounted roller rockers and torque cams at this time. The lifters are still in the engine since they showed no wear on the tear down.
Good info. As Shepard noted this change along with either the Billet or cast aluminum valve covers really quiets valve train noise AND those pesky valve covers oil leaks. I had a lifan from home depot. I ran it, later put the stamped 1. They are for some other engine and don't work perfect. I put them on with the old HD springs from VC. This setup with stock cam worked ok, gave some new power on top end. This had a cut and ported head, header, at some point a larger 32mm carb.
All this time it made about the same valve noise as the stock G9 engine did, it was not loud IMO but could hear it some. It lost a little power and I found the head gasket was blown, but before the 94c clutch it would spark knock some. Then I put in the NR shaft billet rockers and big pushrods and VC rod and cheater cam, still running stock valves and caps on both. I had to shim the shaft rockers higher 1.
It is still roughly the same to me maybe a little quieter. It always would get louder if the lash was big. The old stamped 1. Just put a 30mm slider carb on and it runs nice but have to make a custom cable hookup for it, can't ride with a hand pulling the cable lol. Now reason I can get away with this is the cheater cam is stock lift, so it does little in way of changing the action of the valves just open longer. It was over 5K rpm at 38gps with the stock cam.
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