Maintenance Tips

Stuff we came across on the Internet that may turn out to be useful:

Disable ABS in pre-BS6:
In the BS6 RE finally installed a switch to disable the rear ABS. People with older bikes can just pull 3 fuses to achieve the same:
Disable ABS by pulling 3 fuses

 

Head bearings rusted and damaged:
If your head bearings look like this get quality replacements, e.g. from Germany or England:

Kegelrollenlager 30205 J2/Q SKF 25x52x16,25 2,00 price 11,10 – € 22,20 €
expensive but long lasting. You can also replaced the cone set bearings with Timken TRB 30205. Sources for aftermarket Himalayan fork tapered roller bearings:
SKF: 30205 https://www.bearing-king.co.uk/products.php?search=30205
ZKL: 30205/A http://www.zkl.cz/en/cat/srtrb/30205a
Use quality grease to pack them properly while exchanging. I use LIQUI MOLY 3530 LM 47 high endurance – with MoS – 2, 1 kg package.

 

Flawed stator in BS3:
If you happen to have a carburetor version remember the stator is flawed. This was fixed in the EFI version but unfortunately the EFI stator does NOT fit into a carb. bike.
It seems that the stator insulation burns when the bike is used for prolonged high speed rides, but that is just my going theory. It may be a different reason. Fact is they burn out on our 3 carb bikes with clockwork regularity some time between 6000 and 10.000km. This is what a burned stator looks like:


One thing you can do is install an inexpensive voltmeter on your bike, there are different ones available on amazon, e.g. with USB ports or 12V ports. The voltage during riding with lights should never go below 13V (if you have LED light not below 14V). If it does that is a sign of a failing stator. Make sure you get it replaced immediately as the battery is small and the bike will not run for long after it fails.
If charging fails in a BS4/EFI then the cause could be a failed RR unit (and of course in a BS3 as well but this happens much more rarely)
RR Unit parts no. BS3: 587356B  / BS4: 587356C

RR unit
RR Unit

 

Check engine health by looking at the spark plugs:

 

Can you drive the Himalayan with trailer? Apparently you can:

 

General Maintenance Video Channel:
This guy has a very good YT channel where he explains various maintenance issues in great detail:   leuheanrede

 

Going Iridium:
NGK Iridium IX Spark Plug 4218 – Type: CR8EIX.
The “C” in CR8EIX NGK signifies 10 mm thread diameter, likewise ‘B’ in NGK range would be 14 mm and ‘D’ for 12 mm. Be cautious while purchasing online, there are rumors that fake NGK CR8EIX and CR9EIX have flooded these platforms and biggest telltale is that these are 14 mm or 12 mm ‘C’ series, among other indications, thus fake. So what you are looking for is 10 mm thread diameter and 19 mm reach.

 

Carburetor Tuning:
Some People upped the main jet from size 125 to a 130, the pilot jet from 15 to 17.5 and lifted the carb needle by placing a 0.85 M2 washer under the needle seat. You can buy the jets from Mikuni OZ.
Pilot jet – VM22/210 size 17.5 (for Mikuni VM carbs)
Main jet – N102.221 size 130 (for Mikuni VM carbs)

 

Bike too high? You can lower it by 2-4cm:
There are various solutions to this from various vendors but all use the same principle: the connection of the rear suspension to the frame is lengthened by a certain amount. We absolutely reject the various Chinese solutions available on ebay that are variable in length. This part is under a lot off strain and any compromise in material strength or engineering will break it under load. The German Metisse GmbH makes the most beautiful and lightweight extensions. We offer a solution made from the OEM part by extending it, ugly, heavier, but equally stable – and for half the price. We also offer a variety of height reduction options, namely 2. 3 and 4cm, check this page.

 

Throttle position sensor:
Newer EFI/ABS bikes: If you have issues with losing power, surging, or maybe even stalling you may want to check the voltage of the throttle position sensor. After adjustment in the SC to get it where it needed to be the bike appears to be running normal. The service manager also mentioned that RE is considering a recall on this issue.