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V7 Starter switch fail - Power Loss

Discussion in 'V7/V85/V9 Chat & Tech' started by GT-Rx®, Aug 23, 2019.

  1. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Post below started on this topic. Many of the 2013 ~ current V7 & V9's will have this issue in time. The lower ignition switch wires can become unsoldered (see pic below). You either have to remove and repair, or replace the part by taking it from the new lockset assembly. It is not available from Guzzi outside of the ignition only (2D000351) or the complete lockset (2B003493) including gas cap and seat lock assys. On bikes where you can push the key downwards to get the ignition to come on, the raised solder connection points may need to be restored by building up the domes again. They can wear down with use and time. Will post a pic next we do one in the shop.

    E1C96378-8B31-499F-894E-F47578EDAE06.jpeg

     
  2. vagrant

    vagrant High Miler GT Contributor

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    My Iii has done the same thing since new. Now at 13000 miles. I popped the cover off the switch housing top. Saw no reason for it. Deoxit might have helped for a while but too sporadic to know. 90% of the time it's when near other bikers. I'll try to remember to switch on & off the ignition switch next time. I really think it's a poor contact at the push button. Keep pushing on several times and so far it's all good. Let us know if you figure it out first. I know somebody else had it too last year.
     
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  3. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    Vagrant,

    Wow thanks for your comment! It is erratic as hell. So far I have not been stranded. I am going to have Mike Haven do a fall tune up, and will have him take a look at the switch. We will see and I will report back sometime October or so.
     
  4. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    We had a nice ride this morning, no starting issues. I do think, maybe, the starter switch works best with thumb on extreme right edge of button. Bike ran flawlessly, it is a gem, love it.
     
  5. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    Starter switch has been extremely balky: twice a big fuss to start bike. So, I rode it into MPH Auto in Katy, TX, Mike Haven is going to fix it, and give the bike a full maintenance. Also Mike will replace the half-plastic gas filter (thanks for heads up on that). Mike thinks the bike has classic "startus interruptus"... he has a hardware fix to boost starter solenoid voltage from battery...we will see.

    So yeah, I hope to get back a reliable V7 III Moto Guzzi Special. I will report results.
     
  6. vagrant

    vagrant High Miler GT Contributor

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    very interested to know if that fixes it. so sporadic it will be a while before you know for sure. keep us posted.
     
  7. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    Ok, just picked my 2017 V7 III Special up from Mike Haven, here in Houston. Mike concluded the start issue was due to a corroded starter switch. He removed it, cleaned contacts with "oxy-clean", and some additional cleaning. He also checked battery connections, etc. Bike seems happy starting now.

    Note over the past 2.5 years I have been caught in some classic Houston downpour rains. And even though garaged, and drying the bike, with our extreme humidity: switches corrode. Never happened with my 2012 V7 Racer though.

    And, he changed out the fuel filter. Sure enough, it was swollen and ready to fail at 4100 miles.

    Bike is fully serviced, hopefully reliable, and ready to roll. I am planning a week long ride in central TX with my nephews.

    Mike also said his "startus-interruptus" wiring fix will not work with Mark III as wiring changed. He is going to examine new wiring scheme, perhaps it is not causing problems as in previous models.
     
    Bill Hagan likes this.
  8. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    Vagrant: Mike Haven agrees: issue is corroded starter switch. Perhaps take it apart again, and really clean it well. Or, replace switch?
     
  9. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    My starter switch was corroded. Guess they don't seal well, and with our Houston, TX rain, and high humidity: after 2 years use needed major cleaning. So beware of dead starter switches.

    I hope my bike is good to roll, I am planning some fall trips with cooler weather.
     
  10. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    I'd replace it. A new one isn't cheap, but why struggle and wonder if the one you have will work when asked even if you take it apart again to clean it. Usually once corrosion starts, it is nearly impossible to prevent future corrosion even once it is cleaned up.
     
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  11. SheikRamzi

    SheikRamzi Just got it firing! GT Contributor

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    Had to get my start switch replaced at about 1500 miles. It was sticking in the start position, so the bike would start when I pushed the kill switch to the run position. Tripped a check engine light and traction control fault. (Because of the traction control calibration procedure)
     
  12. vagrant

    vagrant High Miler GT Contributor

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    I've been trying to pay more attention to the switch before I try to start the bike. it is not a push button it is a rocker that rocks / pivots in to the right. I suspect I / we have trying to push it in and it just doesn't contact sometimes. so far (knock on wood) it has worked each time I remember to push on the right side and not the center.
     
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  13. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    Yeah so my update: button fixed last Monday via cleaning by Mike at MPH: no issues. Start on Friday morning: a bit balky, but not terrible. This morning: immediate start, and also retested, another immediate start after ride. I do very much think the button works best when pressed fairly hard on extreme right edge. Agree with vagrant comment. I am going to avoid replacing the entire switch assembly if possible. I do wonder if humidity swings are part of what is going on? Very dry here this morning in Houston area (unusual).
     
  14. Brian UK

    Brian UK GT Reference

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    Not seen the wiring diagram for the III, but I wouldn't be surprised if the problem was still linked to the startus interruptus issue.
     
  15. vagrant

    vagrant High Miler GT Contributor

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    mine sat out in the rain yesterday for at least 4 hours. completely drowned this am and started right up.
     
  16. Brian UK

    Brian UK GT Reference

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    I always suggest owners get a can of contact lubricand and cleaner and spray it into every switch and connector they can find. Helps keep that green switch killer at bay.
     
  17. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    Any electrical system experts here? I may copy the V7 III wiring diagram to Mike Haven at MPH in Houston and have him take a look. My bike was the first Mark III he had seen.

    Sooner or later I will sort this out.
     
  18. lucydad

    lucydad Cruisin' Guzzisti GT Famiglia

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    I am still suspicious the issue is related to battery charge. Sunday morning, after the bike sitting a week, start was a bit balky. Rode the 25 miles into church, and next start immediate. Stopped at gas station, start immediate. I am keeping a log. If the balky starts consistently correlate to bike sitting, I am ordering a lithium battery from GT and replacing. Switch gear is very expensive.
     
  19. vagrant

    vagrant High Miler GT Contributor

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    just check the state of the battery with a volt meter after sitting a week and then while starting.
     
  20. tonUPRacer

    tonUPRacer Cruisin' Guzzisti GT Contributor

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    Lucydad, did you ever install the relay by-pass? That solved my issues completely. Now on year 2 of same lead battery starts every time whether sitting for awhile or not, hot or cold.
     

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