High revs - CDI ? or TPS? or who knows what

Hi guys,
i checked many many topics, but still not fully sure on how to fix the issue.

Originally the first symptom was that my speedometer and odometer were not working.
i got a lot of backfires (didnt recognise it might be related)
the speedsensor was disconnected by the previous owner (claims it was not him)
i connected it and it started working for like 2-3km, then died again.
followed the manual - checked the Vcc and it is constant 5V, no matter how i rotate the rear wheel.
all wires checked, seems fine
fuze fine
the display blinks and flashes, so i assume it is also fine

After i connected the speedsensor again suddenly NEW SYMTOMPS appeared:

when i move and hold the clutch the REVS go insane high.
if i go to full stop, the revs go to normal in a bit.
if i push by foot on Neutral, the REVS go high as well.(aka if rear wheel is on stand)
the speedometer/odometer works occasionally. no clue when/how.

I ordered a new(2nd hand) sensor, replaced it, which solved the problem with the odometer, but the other symptoms are still fine. Thins make me think it is the CDI. I was planning to buy Dynatek3000 as it is much cheaper the original CDI, still i am a bit hesitant. As what i recently read it could be the TPS. Any one can explain what is the logic? Also can anyone share a link, how to test this TPS. TBH the only other bike i have owned was Suzuki savage, so this XVS is a black box to me

Cheers

High revs - CDI ? or TPS? or who knows what

lesblank

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