front cylinder doesn't fire

Randy Grein randygrein at comcast.net
Mon Aug 24 22:19:17 PDT 2009


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
>>> www.twfracing.com
>>> ----- Original Message ----- From: "Randy Grein" <randygrein at comcast.net 
>>> >
>>> To: "SV List" <SV650 at micapeak.com>
>>> 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
>>>>
>>
>



More information about the SV650 mailing list