You might want to go into what you've done to the bike just prior to this. If I recall, you replaced the engine recently and did something with the shift plate?

 

Ok. I can do that. I'll try to be short.

1) needed a top end rebuild. Rocker arms weren't in the right position because a piece of aluminum broke off from rocker arm cradles.

2) decided to swap out engine. used engine cheaper getting a new cylinder head and rebuild.

3) mounted new to me engine. discovered issue with gear shift shaft. Opened up the clutch cover, removed the clutch, replaced the gear shift shaft. Broke the detent arm fixing in the process. Managed to remove broken fixing and put everything behind the clutch cover back together.

4) put the rest of the bike back together. Tried starting her up and the results is the video above.

 

Have you tried simple stuff?

Are plugs sparking?
Are you getting fuel to them?

 

I plan to check the spark plugs after work.

I can smell gas, assuming fuel is getting to them? How do I check?

 

Immobiliser?
Side stand cut out switch?
Clutch cut out switch?
ECU recognises "new" engine?

 

This is new territory for me. How do I troubleshoot the immobilizer, side stand cut out switch, clutch cut out switch, and ECU?

 

I recently put new plugs in, bike ran like a dog, turns out 1 of them was gapped far too wide....

 

Sparks plugs are sparking

 

Are you certain that the engine ran before? Did thw PO borrow some part like the crank sensor?
Double and triple chechk all your wiring and connections, particularly those for the ignition. Its easy to mix up or miss a connection, or damage wiring or a connection.

 

Does the EFI/engine management light go off while it's cranking? If so, I would check the fuel pressure and clean the injectors. If not, scan it to see what codes it's producing.

 

I'll put that on the to do list. Thank you

So far I've checked spark. Which is good. Compression is also good. Just about to check the fuel system. While I was doing so, I noticed that I'm missing the breather hose.

 

Would a missing fuel tank breather hose cause the engine not to start? Because I definitely don't have a breather hose connected to the fuel tank.

Update. Sparks are sparking. Compression is good (LH 165 RH 160). On to checking the fuel system

 

Well, got her to run! I'm thinking it is the missing fuel tank breather hose. Got her to run by removing the gas cap? Does this make any sense?

 

Well, got her to run! I'm thinking it is the missing fuel tank breather hose. Got her to run by removing the gas cap? Does this make any sense?

Actually it make perfect sense. A blocked purge valve or non-functioning vapor recovery system will act like holding your finger over the end of a straw of your McDonald's soft drink. The fuel can't flow out of the tank if there's no ventilation. It's the same principle as putting your finger over the end of a straw and pulling it up out of your drink.
It's designed that way to prevent fuel vapor escaping when the engine is not running to reduce air pollution, it's a system invented for California in the 1970's.

 

What you're suggesting is that there wasn't any fuel getting to the plugs then, like a vacuum was formed not releasing fuel from the tank (strange with the fuel pump running) and releasing the gas cap allowed the system to vent (and flow).?

See post #4....

Glad you're making progress...👍

 

Yes, you got it. This was what I was thinking.

Idk if it's true, glad it runs now. lol

 

Well done.....thanks for the update.

Did this new motor run with the old ECU.....or did the new motor come with its own ECU.

Bet you have learned loads about your bike and its systems.

Those motors are bloody heavy arnt they....I have to remove and refit my T100 motor earlier this years....same coulors as yours.

May I ask how much the replacement motor cost.

Completely understand if you dont want to....are they easy to come by?

Nick in the UK.

 

The motor did run with the old ECU. I learned 2017 to 2020 T100 engines were compatible with my 2018 T100.

I did learn a TON about this bike. It has made me a more confident rider.

They are heavy. Why do you have to remove yours?

The replacement was $1350. Asking price was $1800. Negotiated down to $1600. When I got the engine, I discovered the gear shift shaft needed replaced so I asked for a $250 partial refund. And got it.

Easy to come by? There were a few options available on eBay. All with their flaws. It was a matter of which flaw was I willing to deal with.

 

Why did I remove mine....thought I dropped a bolt inside the motor......needed to take the head off to be sure.....as you prob know...you cant take the head off engine in the frame.

I found I didn't drop a bolt inside after all.....but had to be sure.

Could have done with out it all.