Posted February 14, 2000 - 01:42 PM
As seen from the forum. You mention that u installed a vortex CDI. Is it possible that you write a full report of the performance gain on the CDI with WR timing and YZ timing. I am currently intending of buying one of this to boost performance on my WR. Thanks in advance.
Posted February 15, 2000 - 08:12 AM
Posted February 15, 2000 - 07:17 PM
As to performance I LOVE it. It comes with two ignition curves and you can switch between them on the fly via a handle bar mounted thumb activated swithch.
The torque curve is linear in its application of torque and power it has less of a "HIT" but is very fast off the line and is excellent in low traction or tough terrain situations. I even like it when running fire roads which have hard pack with a light coating of dust it gives better control.
The performance curve has a healthy hit in the mid range and is designed with motocross in mind. I pulls very aggressively from mid rang on up. It makes the bike wheelee pron and on the street difficult to keep the front end on the ground in 2 and 3rd while under full throttle (impossible in second must control throttle input and almost impossible in third especially if you are a light weight Im 220 and leaning forward as far as possible to keep it down--makes riding sporting and fun. (even with 15/48 final drive ratio)
I definatly switch between the curves while riding depending on the terrain and riding conditions.
The Vortex ignition raises the rev limiter another 800-1000 rpm and in my case this means I never hit it before I shift. With the stock ignition it hit it all the time. As a comparison I put the stock ignition back on a then I was really banging into the rev limiter in 1,2,3rd. The Vortex ignition works for me.
I had to go two needle sizes richer to get the Vortex performance curve jetted with the YZ timing. Went from a DVR (stock YZ to a DVN) in the #4 from the top. But remember my WR ahs been ported also and may play into the jetting.
M T Racing
7505 Jurupa Ave. Suite C
Riverside, Ca. 92504
Hope this is of some benefit
Posted February 16, 2000 - 05:01 PM
The TPS appears to work by changing the resistance in the sender, can it be fooled into giving more torque by placing a resistor in the circuit? ie does it retard the timing in response to a wide opening at low revs?
I guess I could find out if I disconect the neutal switch and observe the advance effects with my timing light. Thoughts?