ZCNZ

By stretching the clutch spring the clutch will defiantly engage sooner. If the spring is really stretched out the clutch will always be engaged slightly. If I where you I would use the last hole (there should be 3 holes all together use the one closest to the center of the clutch shoe) on the clutch shoes which will engage the clutch at the highest RPM. I am running the HPI Racing Clutch and I always used the hole closest to the center of the shoe for better bottom end power.

rccrazynut

If you engine sounded like it was reving out and the truck is not going any faster I would check the spur gear slipper clutch nut. It should be a 10mm nylon nut that comes loose all the time. I had this happen to me when I first got my MT2 18SS and was running it for the first time in the park. I wound up melting the center of the spur gear where the brass bushing goes. What I have done to fix this from happening again is put blue thread lock on that nut after I adjusted it to the best setting for me.

Getting back to what I said about HPI quality (cheap plastic) a few post back, these problems are exactly what I am talking about that HPI does not address. HPI nylon nut are garbage. Do yourself a favor and go to the local ACE Hardware or Home Depot store and get new nylon nuts for the spur gear and the wheels. I'm sure everyone out there had one of there wheel come loose and round out the where the wheel hub goes because the wheel nut came loose. I wish HPI would address these types of issues.