[d.hristov88]

Tnx. Will check it asap

 

[d.hristov88]

dumb question, but how do i set the idle to be exactly 1000?

 

[d.hristov88]

V-Star 1100 Wiki Knowledge Base - TPS

Throttle Position Sensor The TPS reads the position of the throttle, and causes changes in timing. Some info is available in the Yamaha Shop Manual, but is sketchy and falls short of the excellent info available via the Clymer's manual - which is a good investment if you plan on working on your

sites.google.com

the speedometer i fixed by replacing the sensor. So i still think the issue is either the CDI or the TPS. If i disconect the sensor there is no issue with high revs, so unfortunately i think it might be the CDI, but it will be cheaper to test the TPS first. At least this is my logic, but as i said i would identiy more as a monkey with wrench

 

[d.hristov88]

• XVS 1100 2001
• How to adjust exactly 1000 rpms?
• Should this TPS adjusting be done on running engine, or it is enough only the key to be on ON ?

 

[d.hristov88]

Yes, i read it already, but there it says "adjust RPM to exactly 1000" and i dont understand whether the engine should be running while i measure with the multimeter.
Actually do you think in general, having in mind the symptoms from the first post, that it is possible to be the TPS?

 

[d.hristov88]

I'm not positive on this, but I think that they tell you to adjust the idle speed first, because idle speed adjustment mechanically affects the "throttle closed" position. Idle speed needs to be set with engine fully warmed up.

With that "throttle closed" = idle speed position set, you then check/ adjust the TPS with the engine NOT running. You will be measuring the resistance of the variable resistor attached to the butterfly in the carb.

Do you know what mechanism the engine control system has to vary the engine rpms? It's a carburetor right, not EFI? To vary engine rpms in a substantial way, I would think some sort of solenoid or actuator would be required.

I'm surprised nobody has discussed the speed sensor check or discussed how the speed sensor works. Based on what you said about the engine racing or not racing under various conditions, It sounds to me like a speed sensor, or other electrical, issue. Are there any other electrical components that are malfunctioning in any way?

I just started learning about the VStar's engine control system. I'll try to read more about how the system works before I make too many uneducated comments that I'll have to take back later.

Thanks for the info. Will try to do as mentioned.
About the Speedsensor - i think it is fine. The original one was not giving correct signals = odometer/speedometer was not working. Then i bought one from ebay which started showing proper data on the odo/speedometer. So i assume it is fine. This speedsensor is connected to the CDI, so the next culprit is the CDI, but as i mentioned - was planning to order Dynatek 3000 but before that i wanted to scratch out the other options

 

[d.hristov88]

The issue is not present when the speed sensor is disconected. So it is related. My assumption is that the previous owner tried to revert odometer (to look like less KM). which he fucked the sensor. As the only other thing connected to the sensor is the CDI, i assume this might be fuckedup as well. This is my assumption. Actually there were a few topics here stating similar issues

 

[d.hristov88]

I have multimeter. i assume i can check the resistence. All this what Axeman88 writes makes sense, but i still dont get why the problem is not present when the sensor is attached. To me still all point out to the CDI box

 

[d.hristov88]

Will try to explain better.
Scenario1 - Old sensor disconected:

• backfires present.
• rpms fine
• odometer/speedometer logically not working

Scenario2 - Sensor connected:

• NO backfires
• RPMS go very high when back wheel moves (sensor is counting this movement)

-odometer works fine