Perplexing problem - can anyone help?

[maleko89]

No, '85 through '89 are swappable and '90 through '07 are interchangeable.

 

[HDKILA]

Shuriken,

WTF happened!???? It sounds like me and you have the same problem...

I read through all these pages and then it just ends with no solution!

Spit it out brother! What fixed the beast?

 

[Shuriken]

HDKILA...

It was ignition coil lead wires/caps. I replaced #1 and #3 ignition coil units (including lead wires/caps) with stock ones from a newer VMax. Problem solved.

Somehow the coils/lead wires were breaking down when the bike warmed up or when the RPMS increased - acted just like a rev limiter.

Haven't had a single hitch since.

 

[HDKILA]

HDKILA...

It was ignition coil lead wires/caps. I replaced #1 and #3 ignition coil units (including lead wires/caps) with stock ones from a newer VMax. Problem solved.

Somehow the coils/lead wires were breaking down when the bike warmed up or when the RPMS increased - acted just like a rev limiter.

Haven't had a single hitch since.

I found that out from Mark last night. I only ordered two coils and did not order wires or caps. Do you think that would make a difference?

Thanks,
Abe

 

[maleko89]

Might as well Abe. I get four NGK boots and copper core wire for all 4 cylinders for less than $20.

 

[HDKILA]

Might as well Abe. I get four NGK boots and copper core wire for all 4 cylinders for less than $20.

Where do you get that from...link please!

Thanks,
Abe

 

[maleko89]

Abe, try local bike dealer. They have regular wire on a spool. Just get 4 feet of it. Boots you want are NGK SB05F.

 

[dannymax]

Why not try Birdoprey's COP mod?

 

[HDKILA]

Why not try Birdoprey's COP mod?

What is that?

 

[HDKILA]

Abe, try local bike dealer. They have regular wire on a spool. Just get 4 feet of it. Boots you want are NGK SB05F.

You think I can get that wire from advance auto? It's just wire correct?

Where do you rec'd I get those boots? Are those dealer items?

 

[dannymax]

What is that?

Birdoprey's COP (Coils Over Plugs) Mod

 

[maleko89]

Advance Auto or Napa should carry wire and boots. Wires I use are 7 mm.

 

[buckridge]

hello all, i would like to add my two cents worth, CHANGE THE GAS !!!. also get it from somplace else. bad gas can really make the bike act like it could be a electrical problem .any mosture in the gas that gets into the carbs can restrict the emolsion circuts in the carbs and can be pluging them up intermittenly,making for a hard diagnoses. hope this helps. best to you buckridge

 

[HDKILA]

hello all, i would like to add my two cents worth, CHANGE THE GAS !!!. also get it from somplace else. bad gas can really make the bike act like it could be a electrical problem .any mosture in the gas that gets into the carbs can restrict the emolsion circuts in the carbs and can be pluging them up intermittenly,making for a hard diagnoses. hope this helps. best to you buckridge

i have had gas from all over the place since this started. definetly not a gas problem.

 

[cycotic]

I hate to say it but it kinda sounds like the same thing i was goin through. Do a compression test on all cylinders. Should be 150 to 175.

 

[kebo1930]

All of a sudden i have the same problem. Front right cylinder cuts out at around 4K fires up again when i let off the gas. Have had the carbs off numerous times im convinced it's not a carb issue at this point all the other plugs look great after doing a plug chop when it's spluttering. :bang head: Low RPM run great.

 

[johnpclynch]

I had a problem with my sparks last year (before I did the COP mod)

Turned out to be a problem inside the spark plug caps, the ends of the resistor in two caps were rusted to nothing, all that was left was a black powder

I replaced them with new NGK caps. The insides look something like this...

 

[kebo1930]

Gonna do the COP mod on it this weekend got some R1 plug caps of ebay. After all the reading i got a feeling this will fix her up. Thanks for the info. Will post the results.

 

[GREEN light BLITZ]

I know this sounds like its TOO easy and you might have tried it but it was the bain of my existance for MONTHS and 4 trips to the shop found me no place...The final solution? Make SURE that the hose from your #1 cylinder to the vacuum advance has NO KINKS,TEARS,CUTS, OR RIPS. Anything happens to that hose and your screwed the pooch till you realize thats the issue.Just give it a shot and it might be the worlds easiest fix for a serious problem.Hope you get it.

 

[gamorg02]

hey kebo, do u have tboost?