Topic: Timing and Timing lights

[SKTP]

So I am now at the "get this thing running perfectly stage".

So from what I figure, that's timing and then carbs. My bike is popping a bunch on deceleration but pulls better than ever with the gas.

I took my first crack at STATIC TIMING yesterday and really from what I could tell end up just moving the timing plate a few degrees and testing it anyways...the actual light does not give a precise spot, more like a range to try...unless I'm doing it very wrong.

So that leads me to believe I will get better results with Dynamic timing and a Timing light. Correct?

Anything to watch out for when purchasing a timing light?

Thank for any feedback 

[grcamna2]

A self powered inductive timing light will be best,if you can find 'self powered'

[Jimray23]

Popping on deceleration is typically carbs running a little lean.

--------------------------------------------------
Jim
1979 kz1000b ltd
    stage 3 cams
    pod air filters
    4-1 open exhaust(no muffler)
    full rewire
    dyna-s ignition
    dyna 3 ohm coils

[DaveBarbier]

I have a cheapo timing strobe and it works fine for me. I've never used anything other than that though. But yes, it's best to check timing with a strobe because you can check your timing at advance. Since these bikes are ridden 99% of the time over 3k rpm, your advance setting is more important than idle setting.

For my tune ups, I do static first so I'm close and then Do a dynamic with a strobe and tweak if needed.


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[DaveBarbier]

Popping on deceleration is typically carbs running a little lean.

--------------------------------------------------
Jim
1979 kz1000b ltd
    stage 3 cams
    pod air filters
    4-1 open exhaust(no muffler)
    full rewire
    dyna-s ignition
    dyna 3 ohm coils

Over advanced can cause a lean running condition

[PeWe]

Heavy deceleration can pop when carbs are closed, engine still revving on higher rpm in need of more fuel.
No problem, that how it will work with correct carbs, ignition.....?

[SKTP]

Everything in the engine is bone stock. Carbs Stock. Stock airbox. 4-into-1 pipe (not stock)

[Bailgang]

For my tune ups, I do static first so I'm close and then Do a dynamic with a strobe and tweak if needed.

That's how I do it too, I've gotten pretty good with the static timing because I very seldom have to mess with it afterwards but I always back it up with the dynamic timing just to confirm it anyhow.

[tlbranth]

Popping in the exhaust when heavily decelerating is normal for the old bikes. No worries.

[Keith]

Just my two cents, but you are actually tuning two ignition systems, trying to get them timed exactly the same. I reccomend buying a decent timing light and dwell meter. Very difficult to get it right on without these basic tools.

[Jimray23]

Theres a honda mechanic that has free how too videos on his website. I dont agree with his float setting opinion but some of his stuff is really good.if you want to check it out, here is a link.

http://motorcyclemd.com

--------------------------------------------------
Jim
1979 kz1000b ltd
    stage 3 cams
    pod air filters
    4-1 open exhaust(no muffler)
    full rewire
    dyna-s ignition
    dyna 3 ohm coils

[SKTP]

No video on timing...but thanks for the link

http://motorcyclemd.com/videos/

[riverfever]

I'm running Dyna ignition and 5ohm coils and currently trying to tune at altitude. I set the ignition static years ago and verified it recently but have never checked to make sure the advancer works properly. Probably should before I continue to chase and tune huh? Plugs are very rich in the mid range with the clips in the third slot. Clips in the second slot showed lean though. I'm going to shop for a timing light I guess. Sorry for the hijack SKTP.

[DaveBarbier]

I'm running Dyna ignition and 5ohm coils and currently trying to tune at altitude. I set the ignition static years ago and verified it recently but have never checked to make sure the advancer works properly. Probably should before I continue to chase and tune huh? Plugs are very rich in the mid range with the clips in the third slot. Clips in the second slot showed lean though. I'm going to shop for a timing light I guess. Sorry for the hijack SKTP.

Mid range meaning RPM? Only throttle position determines what system is delivering fuel. You'll need to do plug chops at specific throttle opening to figure out what's actually going on. You could still be lean in the pilot while being rich when the needle is in full effect. I believe it's best to start with an idle chop then go to WOT, then work back from there 3/4, 1/2, 1/4, etc.

[riverfever]

Sorry David I was referring to mid throttle. At 1/4 to 1/2 the plugs are very rich with the clip in the third slot now. I previously had them in the second slot and things were lean.