front cylinder doesn't fire

Randy Grein randygrein at
Tue Aug 25 06:04:50 PDT 2009

One terminal only, will try the remainder - as well as re-checking the  
CDI as Zoran suggested. I was hoping there was another connection I  
missed somewhere; if this doesn't do it there may be a bad (or loose!)  
ignitor to replace.

Thanks for the help guys!

Randy Grein, WMRRA #141

On Aug 24, 2009, at 11:36 PM, Ernest Montague wrote:

> clean the inside of the low voltage coils with brake cleaner, pinch  
> the connector slightly with a pair of pliers and try. You probably  
> have done this.
> On Aug 24, 2009, at 10:19 PM, Randy Grein wrote:
>> So have I. (grin) That's why I tested a complete coil - different  
>> wire, cap, everything. Same symptoms. What worries me is that  
>> there's another connector somewhere else that could be loose, but  
>> after checking the schematics I think that's unlikely and the  
>> problem is right there at the coil. I'll check more later, getting  
>> ready for race weekend.
>> Randy Grein, WMRRA #141
>> On Aug 24, 2009, at 9:53 PM, Ernest Montague wrote:
>>> I've had bad plug wires ( cut them a half inch shorter and screwed  
>>> them back on the post), bad low voltage lead caps at the coil, and  
>>> bad coils.
>>> On Aug 24, 2009, at 9:48 PM, Randy Grein wrote:
>>>> Yup - It fails the classic external spark plug test - use a spare  
>>>> plug, ground it against the engine and look for the spark. It's  
>>>> dark now so I repeated and discovered one of the leads was loose.  
>>>> It helped when I tightened that connector up (with pliers) but  
>>>> still no spark until about 2000 rpm. At least I'm onto something;  
>>>> I'll have to check a number of connections to make sure they're  
>>>> tight, and maybe replace the sparkplug cap.
>>>> Yes, sometimes talking about a problem leads to the solution...
>>>> Randy Grein, WMRRA #141
>>>> On Aug 24, 2009, at 9:32 PM, zoran wrote:
>>>>> you sure it is spark missing?
>>>>> Thanks
>>>>> Zoran Vujasinovic
>>>>> Twin Works Factory
>>>>> 775-786-4881
>>>>> ----- Original Message ----- From: "Randy Grein" <randygrein at 
>>>>> >
>>>>> To: "SV List" <SV650 at>
>>>>> Sent: Monday, August 24, 2009 9:29 PM
>>>>> Subject: front cylinder doesn't fire
>>>>>> Hardly the first time I've dealt with this, but before I could  
>>>>>> always  count on it being the cap, wire or coil - or some weird  
>>>>>> combination of  the three, and intermittent to boot. It will  
>>>>>> light once the motor gets  to about 5 grand (making for a HELL  
>>>>>> of a transition) but otherwise  nothing. I grabbed a spare coil  
>>>>>> and plug, still nothing. Unless the  mounting bracket needs to  
>>>>>> be grounded ( getting it out is a bitch with  all the cables  
>>>>>> there, I just plugged the new one in to test) I'm out  of  
>>>>>> ideas. Anyone?
>>>>>> Oh, this is my street ride - '02, stock stock stock, about 30k  
>>>>>> on the  clock. It was riding fine, then dead.
>>>>>> Randy Grein, WMRRA #141

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