definitive static ignition angle on a 250 (1kt)

[m in sc]

I have searched high and low on here, does anybody have a definitive measurement on a static ignition angle for a stock bottom end 1kt 250? I received my replaced zeeltronic, and it runs, but want to make sure its correct. I did see 31 to 36.5 (which seems reasonable) degrees on here. does anyone know for sure? thanks.

-Mark

[tzr-v4]

The best way to check is :

• program a flat curve from 500 -10000rpm with 19° of advance and 36° of static angle at 36°
• check with a strobe light the real advance
• the difference between real and 19° is the correction of static angle

On my TZR250 2XT the static angle is 36.5°

As it is a mass production, you should make the measurement.

Olivier.

[m in sc]

thats what i was planning to do, flat curve to verify.

do you happen to have the millimeters before tdc to angle list? or the rod length? (i can calculate it if need be)

[rz500guy]

You guys are over my head on this. I just installed the program the way he showed me. You guys are saying there is a better way. Not sure what you are saying about using the strobe light and calculating. I would like to understand if it is going to make my engine safer.

[m in sc]

i just did this, came up with a static angle of 40.  however, it IS a 3xc (r1z) motor. not sure if this matters but thats where it landed.

I did fire up the go pro to document what i did, i need to check it out see if the video makes any sense.

https://youtu.be/ViDO2Srq4Ow

[rz500guy]

Thanks for the video. That helps before I schedule my dyno session. I will find an adjustable timing light to check it. I will watch your video a few more time to be sure I understand. I am a visual learner. I thought you were getting the USB adapter or it could of been someone else. I programmed the 500 with that controller and it runs fine but the laptop makes it so much easier. Borut was very helpful sending me screen shots of the parameters that I was having issues with. Mainly the air jet solenoid setup. Once it was installed much better and a rideable bike. One question I have is how noisy is your clutch when idling? mine seem loud but I have nothing to compare it against. When riding and revving no noise but low idle it seems loud. I really do not want to pull the cover and clutch again. Would be nice for someone to use a phone or camera and video their 3MA idling.  Again thanks the video. I should do the same for the laptop version. Borut was fine with me sharing the info. Less emails for him I would think from others. 

[m in sc]

my clutch is quiet, but, its also a different motor. that camera picks up a LOT of noise and enhances it. (most digital cameras do).

its pretty easy, i don't mind the handheld (i have 2 now), I have 2 bikes i can't use the usb cable on (vcdi-04), I had one when i had the rz, but makes more sense, for me, to have the handheld. and the new one is self powered so its way easier.  but you get the point.

I'm going to verify, mechanically, that it is indeed 40 degrees tonight after work. i just worked up the spreadsheet late last night to do millimeters btdc to degrees on a 105mm rod length/50mm stroke motor so i can make accurate marks using the dial-gauge.  If i have correct info, the 3ma uses a 50.7 mm stroke, and also a 105 rod length? if thats correct i can add it to the spreadsheet.


I'll post it when I'm done with it. Hopefully it can help somebody.

[problemchild]

  If i have correct info, the 3ma uses a 50.7 mm stroke, and also a 105 rod length? if thats correct i can add it to the spreadsheet.

yes, 50,7mm and 105mm is correct...

[m in sc]

https://youtu.be/ViDO2Srq4Ow

pretty sure i did.

[m in sc]

so, trying to figure out why my base timing seems to be off, need to keep in mind the motor is a 3xc, but with tzr carbs/pipes etc. it was retrofit by a previous owner.

just out of curiosity, i looked up tdr and r1z timing, and found this over on the 500lc forum pages. 

i'm wondering it the timing disparity is due to the later motors (tdr and r1z 1kt cylindered motors) having 5 degrees more initial timing, flywheel position different?? thoughts?

[m in sc]

seems like i had the sides reversed in my estimations. had to go 5 the other way, seems happy at 30~31 static, just been out with the dial gauge and timing light. not sure what mess of parts are on the ignition on the motor, but shes good now.