after a few weeks of sitting i thought i would go and have some fun and run my gst in the park today. i did what i normaly do. right from the start it started to puttter and bog down i had it on full throttle and it wasn't runing the way it used to run it would pick up and then slow down. like 5 mins running it just died out and i then tried to start it again and it wasn't starting up. first the engine was hot and smoking. also i checked the glow plug and it was popped so i put another one in and it ran for a couple of mins as well but also bogging down on full throttle. i also hear a noise comming from the engine when it cuts off like a pop dont know if that is normal . i then procceded to look over the truk and i noticed that the clutch gear was lose (the small gear next to the covered transmission. i can slide it back and forth alittle bit but i dont know it thats normal cause the one behinde is tight and dont slide. also other question is that the carb arm wansn't all the way on the engine so i slide that back on maybe thats why it was boggin down. as for my qeustion is that why is it i have my radio set up on all 0 and when the car gets started it wants to move so i am tring to fix that also. need help.

Hey Chris,
It sounds like it could be one of two problems, you said it was bogging at wot and running real hot, reset the high speed needle back to factory and start to retune. It sounds like your high speed needle is to lean. You said you have not ran for a couple of weeks, the air condtions could of changed (humidity). Did you clear the fuel lines of fuel and use afterrun oil, if there was any fuel left in the lines and engine, it could of gummed up. When your truck wants to take off when the throttle is in the nuetrual postions could be caused by the idle is set to high or you have a broken clutch spring inside the clutch bell. To set the Idle pull the air cleaner off and look into the carb. There should be a 1mm gap or opening. You can fine tune this while the engine is running. I took a look at my Nemesis and checked the first speed gear and it was not loose like yours. I would have to see pics of the gear to see exactly what it is doing. It could be a bad bearing or the t bolt could be loose.

what is the reset point of the highspeed needle? i am trying to get a video of the gear moving but having problems transferring it. well are the gears sopposed to slide or are they soppposed to be tight?

Turn the high speed needle clockwise until it stops, then turn counter clockwise 4-1/2 turns. From looking at my Nemesis, I can say that the spur gear should not have play in it the way you descibed.

its a .avi file to big for youtube do you have emial i can send it to? if not how can i tighten it? what are also the factory settings for the carb needle?

Factory settings are as follows, High speed needle 4-1/2 turns and the low speed is one turn out from flush. Dont worry about the vid, but I will pm you my e-mail address.

low end needle is the car needle right? and how do i tighten the gear?

The low end needle is the screw that is on the sliding part of the carb.

Hey Chris,
I couldn't get the video to play, I can tell you from looking at my Nemesis that there should not be any play in the spur gear as you described.

oh ok cool thank you for your help. my low end needle is not flush its actually screwed in some should i make it flush with the hole? i gues i would have take apart my gst to get to that loose gear.

Turn the screw so it is flush and then go one turn.

Chris, I went onto the CEN website and looked at the exploded view and the gear is held in place by a t-bolt Check to make sure that is not loose, otherwise the only other culprit I can think of is a bad bearing.

I'm sorry! I forgot to tell you what the t-bolt is. It is the shaft with little holes that is sticking out of the sprur gear. Also check those phillip head screws on the spur.

thats where i am at now i see the tbolt is tightly screwed on and the first gear is tightly screwed on its the gear behind that one. for the needle screw is one turn out or one turn in? also when i move the gst when the power is off its kinda hard to move.

also do you know how to get the tbolt off? i got the first gear off now theres a metal plate infront of the loose gear.

actually i just finished up fixing it. i just have to put the gear back on and the engine back in then screw it down and try it out tomorrow morening thank you for your help .

Hey Chris,
what was the problem with the gear, inquiring minds want to know!

well the screws were very lose dont know how that happend but i fixed it now i am going to run it to see if its any better.

Glad to hear you got it sorted out...Keep us updated

i will keep yous updated also i have one last question when my gst is off and i push it foward it is a little hard and the gears make noise i was wondering if that is normal because my ct5 dont make any noise when i push it fowrd. let me know if thats normal noise from the gst

Chris, its normal if your brakes are dragging just a bit, when you push the truck backwards the oneway inside the tranny will engage and spin the tranny, so backwards yes, forwards make sure your brakes are not engaged abit

where would the breaks be located? maybe thats the problem. is it by the gears?

That sounds normal to me, when your truck is off and you push it backwards the spur gears should spin, as well as the clutch bell housing on the motor. If you manually flip the transmissions reverse servo/lever and should reverse it, so when you push your truck in the opposite direction it should now spin the gears in the same fashion..

If you're getting any grinding or binding of any kind, check to make sure your throttle servo isn't applying a little brakes, as sometimes if there's even a little tension on those brakes they'll bind up..

Good luck!

how can i find the linkage where the breaks are located?

The brake linkage is connected to the same servo as your throttle, if you're looking at the top of your GST, you'll see two little rods connecting the throttle/brake servo to the brake cams (little arms that twist). When brakes are applies your servo pushes against those arms and they apply the brakes which are under your truck. If you look on the bottom of your GST you'll see the plastic front drive shaft, and metal rear drive shaft, you should see the brakes themselves mounted on each of the drive shafts, they look like 2 little metal discs on each shaft.

I hope that helps. I would post a pic, but I'm at work