My son has the same complaint on the thumb throttle. As soon as I/we get into riding good, he says his thumb hurts. Where did you get the twist throttle and was it difficult to add on. My son has a Predator 90.
Thanks,

 

dogg, My little girl has a predator 50 2004 the handle bars are 7/8" where they clamp around the triple clamps, but where the grips are it goes down to 3/4"and nobody makes a twist throttle for that.I will bet your 90 has a handle bar dimension of 7/8'" all the way to the end.You can buy a after market twist at any bike shop and it should fit , the only thing is your cable end might not fitand you will need to have a cable made.TERRYCABLE.COM in Victorville Calif. call them and you can buy the whole set up twist and cable from them.check the diameter of your bars first. On ours we had to change the bars(from a kx 60)and the twist is from a yamaha yz125 but it works great. She is 7 yrs old and we ride for 2 hrs at a time. let me know if you need any help. c-ya

 

Daddysgirl,
I have twin 8 year old boys and they each have a 2004 predator 50. After reading this thread and your response and talking to the guy at Speedwerx, I bought two of the ignition boxes from Speedwerx. I installed them tonight and it didn't make a difference in top end speed at all. They would go 15 mph before and only went 15 mph after I installed them. Since this is two different quads and two different ignition boxes, I am inclined to believe it isn't because of a defective ignition box. I matched the colored wires and had a grey one left over, which is what I was expecting. There were no instructions, just two ignition boxes. I didn't see anything else I could do different. The sound, performance and speed of the quads seems no different. I was expecting at least a 10 mph increase in speed. Was there anything else you did when you installed your ignition box? Was 15mph the top end you had before you installed the new ignition box? I will be calling Speedwerx tomorrow, just wondering if you had any ideas on why nothing changed for our quads?

 

criminalmind,
I'm not sure about Speedwerx's products...decided to play it safe and go with WRH racing. I bought a box from Billy Holt, and it lifted the 15mph limit. I don't know how fast it goes, but it definetly winds the little engine up.
I also made two minor mods that Billy clued me in to, and WOW. It's not a full out race machine, but has alot more punch now.

Give Billy a call,

WRH Racing

He's great to deal with!

 

Akwood, What were the other two minor mods you made to your Predator 50? I would be interested in making them also.

Thanks!

 

1) Lower the carb needle by raising the clip one position. The carb is jetted rich from the factory, so this will lean it out a bit.

2) Remove the stinger on the end of the exhaust pipe by cutting it off flush with the back of the muffler. Then take a drill bit the same size as the muffler opening and drill a hole through the internal baffle. This removes SOME of the backpressure that is caused by the restrictive OEM exhaust. It also makes the quad sound pretty cool!

I did these two mods prior to installing the CDI, and the low end punch that it added to the machine was quite noticeable. I warned my son about the extra power before he took off, and it nearly through him off the back because he wasn't expecting it. The CDI was just icing on the cake. I clocked the speed with a GPS unit last night, and was able to hit 19mph before having to shut it down (my street is too short), and the bike was still pulling.

 

I have a 2005 predator 50, 2 stroke, and it is a real pain to start when it has been sitting for a while, like a week or more. I was wondering if anyone had ever added a primer bulb to theirs and how it worked? It just seems to me like all the gas evaporates from the carb and it takes forever for the carb to prime up again by the starter.