[johnyelland1234]

Have you checked the air filter ?

Checked that. Looks brand new and is clean inside. These bikes are serviced every 3000mls though.

[robinb]

thats good.

did you figure out what the 60v setting was on the article i linked ?

if the have checked the 0.56v, the pump etc.

The only other thing is the MAF sensor
.

[johnyelland1234]

thats good.

did you figure out what the 60v setting was on the article i linked ?

if the have checked the 0.56v, the pump etc.

The only other thing is the MAF sensor
.

I did have a search around and checked the workshop manual, but couldn't see anything about the voltage.

Good point about the MAF (called O2 Sensor) on the Himmy. It's very easy to remove, so I might do that and see if it needs a clean.

Haven't done the TPS yet, waiting for a new Iridium spark plug first.

[zimmemr]

I did have a search around and checked the workshop manual, but couldn't see anything about the voltage.

Good point about the MAF (called O2 Sensor) on the Himmy. It's very easy to remove, so I might do that and see if it needs a clean.

Haven't done the TPS yet, waiting for a new Iridium spark plug first.

I've never heard of an 02 sensor being referred to as Mass Air Flow Sensor. MAF's measure the amount of air flowing into an engine, while 02 sensors measure the amount of oxygen in the exhaust gases.  https://www.samarins.com/glossary/airflow_sensor.html

But that aside I've seen plenty of 02 sensors fail, they're generally considerd an expendable part like a sprk plug or air filter, and in fact I suspect the one in my own Himalayan was acting up, but in my case I think it was causing the bike to run lean. I bypassed mine, when I removed the CAT, and the bike has run perfectly ever since. My local dealer, who I trust, has told me he's had one instance of a Himalayan running overly rich that was traced to a bad 02 sensor as well. Generally a failed 02 sensor will set the CEL, but not always so it's certainly something you want to check.

[robinb]

an O2 sensor is in the exhaust side. (also known as Lambda)

MAF is on the inlet side.

[johnyelland1234]

Oh yes you're right.

I'm taking the fuel tank off tomorrow to finish wiring in my new spots. I'll try to remove the O2 sensor and see if it's coked up and give it a soak in petrol if needs be.

[johnyelland1234]

New Spots. Had to design and 3D print some carbon fibre Nylon brackets that do the same as the Mad Dog ones. Couldn't find them for sale in the UK.



Also removed the spark plug and fitted a new standard one so I don't foul up the Iridium one that'll eventually go in once the issues are sorted.



Looks fine to me, and according to the comparison chart. Going to be removing the oxygen sensor and cleaning it with throttle body cleaner tomorrow.

I think the issue is the surging/misfiring. When idling cold, it idles at around 800-900rpm. It surges but misses the odd ignition cycle, as the idle is so low, I think it's cutting out before it picks back up. Thinking faulty ignition coil. But I'll try the oxygen sensor first and see what happens.

[robinb]

keep us posted.

[Carl Fenn]

Just as a matter of interest have you been riding off road and riding in water they can take in water from the rear wheel into air box which can effect running, did they fit the right body at the dealer 4 or 5 for instances l think there would be some difference.

[johnyelland1234]

Just as a matter of interest have you been riding off road and riding in water they can take in water from the rear wheel into air box which can effect running, did they fit the right body at the dealer 4 or 5 for instances l think there would be some difference.

Nope, no real offroading or riding in deep water. I have checked the airbox and it's like new inside.

I actually fixed this, turns out it was the Oxygen Sensor. I took it out and soaked it in carb cleaner overnight. Cleaned it, dryed it and refitted. Bike ran loads better.

Fitted an iridium spark plug and it's running pretty much spot on now.

RE are going to fit a brand new oxygen sensor under warranty, but the issue seems resolved. Starts in the cold with no cold start at all. Idles fine. I think it may have fouled when the throttle body failed before.

Think the dealer should have picked up on this. But hey ho, at least it seems fixed.

[robinb]

Glad my suggestion worked.

Normally it’s all basic stuff .

Enjoy.

[johnyelland1234]

The bike failed again. It started to take ages to start and when it did it would just cut out even with holding the throttle on. Got it recovered to the dealership for the 4th time.

They replaced the oxygen sensor, throttle body (with another new one), correct the valve clearance which was a bit out.

I picked it up and it was fine. Rode home.

Later that night, it started great and was fine going to work.

----

This morning after my shift, it started fine but did stall after about a minute of idling. Started it again and it was fine. No biggie.

When I was riding out of work in 1st gear at low speed, it was stuttering, even with the clutch out.

When I got to the main road and opened it up, it seemed to be ok.

----

Time will tell, I'm going to work in a bit and the bikes cold so I'll see how it's doing then. I've checked the chain tension and it's fine. Fairly new heavy duty chain too.

Ho hum, hopefully it was just a blip, but knowing this bike it probably isn't.

[johnyelland1234]

Oh, and from what they said, when they fitted the first new throttle body, they didn't push the top connector all the way in so it was seated securely. Probably worked its way out while riding with the vibration. Great tech team.................

[lex131]

Any updates? How's it running? Any new discoveries?

And btw, did you change the relays?

[AzCal Retred]

Maybe Plan B...?

https://accessories.hitchcocksmotorcycles.com/41381?cont_page=Royal-Enfield-Himalayan-Accessories&keyword=carb

PART No. 90058; CARBURETTOR CONVERSION KIT (Himalayan); £369.00

Carburettor conversion kit for the fuel injected Himalayan models. This kit includes all the components required to convert your Himalayan away from fuel injection to a CV carburettor.
This will give similar performance figures to the fuel injection system but the main benefit is simplicity and the ability to fine tune the carburettor yourself to match the engine or any future modifications you make to the bike.
All of the components are bolt on items, and it is a completely reversible modification. Supplied jetted to suit the standard Himalayan model.
This only fits 2018 - 2021 fuel injection models where the standard ECU is located under the seat.