Yamaha n max 125 2015

[Hughes6420]

Bought this bike as a non runner changed plug still won’t start,realising fuel wasn’t getting through injector replaced and still won’t work .next step check tappets and adjusted correctly via bike machanic still won’t work.changed coil and still won’t work.pulling my hair out has anyone got some advice for me cheers dan.ps first timer on here 👍

[Turn7]

Fuel
spark
compression

You changed the coil but dont say if you actually have a spark ?

[Hughes6420]

Yes have a good spark

[Turn7]

Is fuel actually being injected ?

[Hughes6420]

Yes fuel getting through and spark plug smells of fuel also when plug out put thumb over plug hole turned over and lots of compression

[A500leroy]

Stupid questions first. Fully charged battery? fuel in the tank?

[Hughes6420]

Drained fuel put new in charged battrey also have jump pack

[A500leroy]

Pulling the brake levers on when starting?

[Hughes6420]

This might be a stupid question but went to take out lambda sensor and I undid nut but wouldn’t screw out.could a faulty one stop the bike from starting

[Hughes6420]

What both levers

[A500leroy]

Worth a try i cant quiet remember how yam scooters start if its one or two.

[Turn7]

Old fuel ?

[Hughes6420]

Brand New fuel and both levers still nothing😾

[A500leroy]

id be tempted to check the connectors around the brake system and sensors then. It wont start if it doesn't think the brake is on.

[Hughes6420]

Ok I’ll do that tomorrow

[Turn7]

A500leroy said:

id be tempted to check the connectors around the brake system and sensors then. It wont start if it doesn't think the brake is on.

Pretty sure it wouldnt spin over if that was the issue.

[freddytin]

A tricky one as you bought the vehicle with at least one problem.

So, with a new plug , try Easystart or similar directly through the intake, using the smallest amount of throttle opening possible.

Report back, fingers crossed you should have at least a cough and hopefully fire up briefly.

Edit to add, this should at least eliminate one or two unknowns

Edited by freddytin on Saturday 11th April 19:37

[Hughes6420]

Thanks have already tried but still nothing I’ll check brake sensors tomorrow then I’ll get back to you

[Hughes6420]

Good morning every Hope your all well. So got up and took off brake sensors gave a good clean as were grubby spray and cleaned with electrical cleaner and replaced and guess what?????
It still does not start. Anymore ideas before I set fire to it cheers dan

[A500leroy]

immobiliser?