Royal Enfield bullet oil filler extension

[stinkwheel]

Thought I'd share this since a few people on the forum have Enfields too.

Pre-unit Enfield bullets of any vintage aren't known for their conservative oil useage. They tend to leak/burn a fair bit and require regular checking and topping up.

On a long trip, this is a bit of a pain because the oil filler is a bit too inaccessable to simply pour oil into from a bottle if you get caught short. You either need to take a bottle with a long spout or a funnel. I for one am fed up with having to carry an oily funnel about with me all the time.

The simple solution would be to extend the filler neck so you CAN pour oil from a bottle into it.

So I got my local engineering spot to make an extended filler neck up for me out of alloy. Works a treat. He added the "cooling fin" detail hiself. This isn't a big job at all for someone who can work a lathe.
https://i48.photobucket.com/albums/f216/stinkwheel/CIMG2266_zps2yqfgdmk.jpg
https://i48.photobucket.com/albums/f216/stinkwheel/CIMG2267_zpsdl2xdd5k.jpg

The bottom seals nicely against the existing o-ring. I've fitted a bonded seal (Dowty) washer under the filler cap.

The only remaining job is to fit a longer dipstick. It simply screws in and has an M5 thread so a bit of 5mm bright steel bar, a hacksaw and an M5 tap are the only tools needed to make a new one.

Here's the plans (remember I'm a vet, not an engineer and did this on libre office draw, not a CAD package so the drawings may not be perfect but the measurements are correct).

https://i48.photobucket.com/albums/f216/stinkwheel/extension%20collar_zpsjolx5hxe.png

NOTE: There is more than one type of oil filler cap. This one is a screw-in type with a round dipstick. You'd need to do something different if you have a push and turn one with a flat dipstick.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Pete.]

Nifty idea but christ what a crappy way to finish a part. No broken corners, galled thread and face and his 'cooling fin' detail looks like the part has spun in the chuck.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[stinkwheel]

[Triton Thrasher]

Should/does it have a breather hole?
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Rrrrrrrrrrrrrrrrrr

[stinkwheel]

[Rogerborg]

But I like my oily funnel.

He's right, I genuinely do carry one, with most of the spout cut off.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[YBR Ric]

Nice mod, but I'd have thought the last thing you would want right there is extra cooling to produce even more mayo.

[RhynoCZ]

[Triton Thrasher]

[bikenut]

you just back from the dragon........you use your bike all year round by the looks......how are they for british roads....ideal for india....as guy has shown us.......what speed does it cruise at please...oil consumption and mpg for moderate riding......max half throttle say......I would mod a vibby mirror........ :karma:
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nuts about bikes

[stinkwheel]

[Rogerborg]

Is yours an iron 350?

My AVL 500 does about the same top speeds, although it will indicate higher. It's all torque and might conceivably add another few (real) mph with a bigger front sprocket. It doesn't burn or spew oil (yet), although keeping the primary cover sealed is an ongoing project.

mpg is indeed 80 or more. Fuel is energy is power, and it doesn't make much.

The electric starter on the AVLs is a TRAP. It does start the engine but will almost inevitably jam the sprag clutch. At that point, your starter is constantly engaged with the engine. My (already replaced) sprag just jammed but I got lucky and it freed off when I wiggled the drive shaft back and forwards a bit, but it should be considered an emergency starter only.

The post 2008 fuel injected UCE engines are a different prospect with a lot of improvements - including to the starter and sprag. Unless you actively want a project bike, I'd suggest looking at one of them. They even have a fuel gauge instead of an ammeter. Luxury!
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[RhynoCZ]

[stinkwheel]

[garth]

600ml in 360 miles is 1.6l in every thousand.

With consumption like that it's not worth changing the oil.
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You ain't a has been if you never was

[Rogerborg]

[stinkwheel]

[Rogerborg]

Did I tell you about the time that I was behind a Nissan Micra being driven by a lady at a variable and appropriate speed for the road and conditions?

I was so amazed that I followed it for a few more miles just to be sure that I wasn't imagining it.

True story. My life, you want it.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[reckless_b]

My 350 bullet is in the same ball park as the others I guess, fuel somewhere over 80mpg, 60-70mph depending on conditions, I haven't noticed any significant oil useage as yet, its got about 7,000 kilometers showing so I guess its run in, its had the pulse air thing removed has a short sporty exhaust and electronic assisted ignition. I buy most of the consumables from india, air filters oil filters etc, very cheap off ebay, when I use the bullet instead of the car to go to work it only takes about six days to cover the cost of the road tax, with todays fuel price I guess about 4 days will be enough to cover it, although petrol has gone up 2p in the last couple of days, love to ride it, always leaves me with a smile on my face, plus the wife wont go on the back
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40 years on the road on and sometimes off bikes with a very recent OFF

[RhynoCZ]

[bikenut]

:D

so its the kind of bike where you go everywhere at 60ish then....

and overtakes are planned rather than a mere opening of the throttle.....

a bikers bike.

.......meaning a good riders sort of bike...as it seems any monkey can rotate their wrist clockwise..........anticlockwise however??

:karma: :karma: :karma:

they have good handleing and cornering ability as well as good enough brakes ? ......again rider dependant I suppose......

will talk to a mate as I see he has one now....he had a new ural combo ( and trailer ) about 2 years ago...... or looked like a ural minus the ak47 :D
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nuts about bikes

[Rogerborg]

[YBR Ric]

[bikenut]

so a bit of a bikers bike then........there most be some better aftermarket bits an bobs out there surely, like better rear shocks and some f/fork stuff..........

don't these bikes have an internal dry sump lub system rather than a wet sump??

the thread says summut about c/case breather mods............they have lost the royal oilfield monica ??

guy didn't mention auwt about oil leaks......he had panniers on his so they take a load then.......60mph and 80mpg.......and decent handling round the twisty bits......
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nuts about bikes

[Rogerborg]