Ridemalibu Motorcycle Rentals & Tours – Los Angeles CA
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California 1400 hanging throttle

Discussion in 'Cal 1400 8V' started by guzziken, Jul 22, 2015.

  1. roadventure

    roadventure GT Reference GT Famiglia

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    I don't know about that. But, I did find it very surprising that when I broke my clutch switch I began to get the high idle when I was at a stop. It was from this experience that I learned that the clutch switch seemed to be controlling more in the computer that one would think. The clutch switch is delicate and in my opinion not the best choice for the job from the point of view of durability.

    But, it wouldn't hurt to have a dealer perform a functional test for the clutch switch. If it is found to be working as designed, then it can be eliminated as a cause. It is worth a chance....
     
  2. Loosy gussi

    Loosy gussi Tuned and Synch'ed

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    Thanks for the info,.. I did some more reading in the shop manual, clutch, page 128 trouble-shooting. It appears there is a 3 wire harness. .I don't have diagnostic equipment but it looks like the problem could be 1. Clutch lever sensor, or 2. Cable harness. From what I see on the Web it looks like all one deal.. any hints on where I can buy? OR Just head over to dealer (little spring loaded switch seems to operate fine). Thanks, John
     
  3. roadventure

    roadventure GT Reference GT Famiglia

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    I bought my clutch switch from AF1 Racing. It was about $80.00 and it does have the harness attached.
     
  4. Loosy gussi

    Loosy gussi Tuned and Synch'ed

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    Thanks roadventure, will give them a call, great help, & great site.
     
  5. roadventure

    roadventure GT Reference GT Famiglia

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    Come back to let everyone know if a new clutch switch helped your particular problem.
     
  6. Loosy gussi

    Loosy gussi Tuned and Synch'ed

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    Wanted to get back to all, unfortunately I don't know the answer. I found I still have a few months on my warranty and took the bike to dealer to have a look, he said clutch switch is good, no codes, clean bill of health. This condition on my bike usually only appears after a long, hot, ride & would be hard to duplicate. I talked to Todd, he did a few remote adjustments to the maps. ( read in mileage thread). I rode the bike from San Diego to Ocotillo & back and hanging throttle did not reoccur. I don't know the solution, but running hot seemed to be what made it happen for me.
     
  7. David Rodríguez

    David Rodríguez Just got it firing!

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    Hello. I have no idea of electronics but I wonder if this device could help with the problem:
    http://memjet.hu/index.php?option=com_content&view=article&id=65&Itemid=63
    I live in Madrid and I always have the issue when the engine is hot. It is very embarrassing and when it happens in neutral I panic to clutch first gear and break my gear box. I can´t believe how Moto Guzzi does not recall all the motorcycles with the problem. I think it is related with the air temperature. This device modifies the value of temperature in the ECU.
    Thank you for hearing my not specialiced opinion.
     
  8. ZClark73

    ZClark73 Tuned and Synch'ed GT Contributor

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    Great thought! Fueling is a fascinating subject, especially for our air-cooled V-twins. The Memjet doesn't quite modify the value of the temperature in the ECU; what it tries to do is manipulate the O2 signal in such a way that the engine will run richer(which cools the engine with the extra fuel in the engine). The best and brightest around this forum have written extensive threads on it and the consensus is more or less that, while the Memjet (and other things like it) are well-intentioned, they are barely helpful. The problem is much bigger than the Memjet is able to fix. It would be like having a 8-inch gash and only putting one stich/suture on it. What takes the same idea and executes it flawlessly and thoroughly is the GT-Rx Flash combined with the Auto-tuning Power Commander V. (https://www.guzzitech.com/store/product/gt-rx-pc-v-at300-ecu-flash-tool/). Not only are there proven, measurable performance gains but also measurable engine temp differences (the exhaust heads cool down by about 40F with this system). I've put it on 2 Guzzis so far (2010 Grivo 8V and a 2014 Cali14) and it is impressive to the utmost. Not only do the engines pull significantly harder, but the throttle is SO MUCH smoother especially in the lower rev range. I live in a Central California town where our summers are regularly in the 90-110F in the daytime and when I made the switch from a Memjet to the Guzzitech system I could tell a big difference in the heat coming off the engine while I was riding around. It may seem "expensive" compared to a Memjet, but when you understand just how little a Memjet does and then consider how much the GT-Rx system does (smoother throttle, more power, lower temperature, less stress on the engine, etc.) it an easy price to pay IMO. Enough so that I budget the system into the price of whatever new bike I'm looking at before I buy it. With the problems you are talking about having, I'd HIGHLY recommend getting this system. You won't regret it; I know I haven't.

    ~Zack
     
    David Rodríguez, Rickhinnz and GTM® like this.
  9. caliman

    caliman Tuned and Synch'ed

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    I would imagine that a rexxer tune is somewhere in between in both price and execution.
     
  10. David Rodríguez

    David Rodríguez Just got it firing!

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    Very helpfull. Thanks a lot.
     
    ZClark73 likes this.
  11. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Think there's a few here that tried it, the hard way. Most have my kit on now.
     
    blakbird likes this.
  12. chrisjoffe

    chrisjoffe Just got it firing!

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    I just bought a '14 Touring that has 5500 miles and has the hanging throttle problem. Is the consensus now that it is caused by the clutch switch?
     
  13. sir fred

    sir fred Cruisin' Guzzisti

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    It was on mine. I suspect it will go again at some point but it is easy to replace and not overly expensive.
     
  14. kiwi dave

    kiwi dave GT Reference

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    Easy to find out. Place into first gear and try to start with the clutch pulled in. If you can, then the clutch switch is OK.
     
  15. chrisjoffe

    chrisjoffe Just got it firing!

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    My switch moves with the clutch and clicks like it's working. I'll try the starting test later when I leave work.
     
  16. chrisjoffe

    chrisjoffe Just got it firing!

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    The bike does not start in gear with the clutch pulled in, so I presume the switch is bad. I've swapped the simple ones before. Where is the wiring harness connection on this one and how hard is it to get to?
     
  17. roadventure

    roadventure GT Reference GT Famiglia

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    I replaced mine and don't remember exactly where the cable plugs into the bike wiring harness. But, I don't remember it being anything difficult. Just look at your existing switch and follow the cable from the switch, down the handlebar. I think you should be able to find the plug pretty easily.
     
  18. chrisjoffe

    chrisjoffe Just got it firing!

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    On a related note, after doing a bit more riding (pre-repair still), I've noticed the throttle can hang on decel under engine braking without ever touching the clutch. I'll roll off the throttle to jake-brake it down to a stop and the idle will catch at about 2700 RPM and coast there, leading to some panic braking to get it to stop. This is particularly bad while decelerating through a corner, only to have it launch forward in the middle. I'm used to riding the older one with consistently HUGE engine braking.

    Has anybody seen THAT behaviour?
     
  19. WroomWroom

    WroomWroom Tuned and Synch'ed

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    I would say that kind of behavior was happening to my bike. No clutch needed, simply releasing the throttle while in 2nd gear with RPMs over 3000 would make the bike artificially keep the RPMs at around 2500 even though there's no throttle input.

    My problems got resolved not by replacing the clutch switch but by doing the "moaning whale" mod (look it up on this forum) and by cleaning the air filter box (not just the filter but the box itself) and the throttle body air intake valve (it's right behind the air box).
     
  20. roadventure

    roadventure GT Reference GT Famiglia

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    Good information. Thanks!
     

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