{"id":19216,"date":"2023-05-31T20:24:03","date_gmt":"2023-05-31T11:24:03","guid":{"rendered":"https:\/\/www.decoboco.info\/en\/?p=19216"},"modified":"2026-09-24T13:46:12","modified_gmt":"2026-09-24T04:46:12","slug":"tzr250r-sp-3xv-seat-cowl-removal-convenience-engine-starting-issue","status":"publish","type":"post","link":"https:\/\/www.decoboco.info\/en\/20230531\/video\/tzr250r-sp-3xv-seat-cowl-removal-convenience-engine-starting-issue","title":{"rendered":"TZR250R SP 3XV Seat Cowl Removal Convenience Improvement – Engine Starting Issue Diagnosis"},"content":{"rendered":"
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The 3XV has come back to me again.
The seat cowl removal is incredibly tight…

“Leave it to me” <\/strong>
So I’m proceeding full steam ahead~ <\/p>\n\n\n\n

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This frame and side stand are super annoying.
You have to spread and twist it just to get the tail cowl off…

It’s nearly impossible to remove without scratching it
You can’t casually remove the fairings. <\/p>\n\n\n\n

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I cut away everything that wasn’t needed.
Finished with minimal work!

Since there’s welding work to do, I’m putting this on hold for now. <\/p>\n\n\n\n

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Now I’m investigating this mysterious starting issue.
It takes about 100 kicks just to barely get it running…

This is a case I’d rather not deal with…
But I’m overflowing with TZR love, so I’ll do my best (\uff1b\u2200\uff1b)

First, let me check the spark.
A Watanabe coil is installed and
“Patchpatch” <\/strong>it was.
*Strong spark

I was suspecting the electrical system, but hmm?? <\/p>\n\n\n\n

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It must be that fuel isn’t getting through?
Even with external fuel, there’s no change.
The self-acceleration pump thing doesn’t work either.
Nothing changes…

Two-strokes usually just start, right…?
That’s the image I had.
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Everyone, please bring your manual. Absolutely.
I won’t diagnose any bike that doesn’t have one, so please understand.

Let me check the engine compression.
Basically process of elimination.
“Absolutely no problem” <\/strong>I eliminate things one by one in that flow. <\/p>\n\n\n\n

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Hmmmm… no problems.
Even if it’s really low, it should at least fire once… <\/p>\n\n\n\n

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It must be the carb… it has to be the carb…
The jets and needles are all stock…

Not clogged.
I’ll wet the float chamber and seal it up (\uff1b\u2200\uff1b) <\/p>\n\n\n\n

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Reading through the wiring diagram.

The main ground is so weak I don’t even know where it is.
That’s two-strokes for you.

CDI ignition, it’s been a while.
Huh, the coil grounds out?
I’ll try dropping it directly- <\/p>\n\n\n\n

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And there it is…. (*\u00b4\u8278`) I’m deeply moved.
It was twisted and fixed inside a heat shrink tube.
This was the cause of everything.

I also added a direct ground connection to strengthen it. <\/p>\n\n\n\n

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I also added a secondary ground, so now it’s running strong! <\/p>\n\n\n\n

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