Royal Enfield Bullet Classic Diesel Review from ChoiceQuote Motorcycle Insurance

25 Фев 2015 | Author: | Комментарии к записи Royal Enfield Bullet Classic Diesel Review from ChoiceQuote Motorcycle Insurance отключены
Royal Enfield Bullet 350 Classic

Royal Enfield Bullet Diesel Review

From course green to motorcycle

Do you a motorcycle that can achieve in of 150 MPG? Then you need to to Trevor Williams.


For many years remained a dream until in the 1980’s, the Robin diesel found it’s way into a Enfield motorbike and Trevor to see the way forward for his dream. He saw how a diesel plant could be successfully to the flat backed four gear box of the iron-head Royal engine.

Then, at Christmas Trevor saw on a website that a enthusiast had in fact successfully put a small diesel engine in a Enfield Bullet.

This was the Trevor needed; he immediately set buying a Royal Enfield bike. Almost instantly he a mint condition, two year old 500 Classic for sale, that had done 45 miles! This the standard Royal Enfield with the iron head, gearbox and kick start.

The donor bike Trevor

Trevor wisely did not tell the what he intended for the bike. In prior to the conversion to diesel Trevor admits to never starting the bike’s existing engine. Royal Enfield in themselves are no strangers to green with MPG figures of 90 MPG plus achieved from their petrol engines.

As soon as got the bike back to his garage, he ripped the petrol engine out and started much head It took several months and a few of trial brackets before was able to design the perfect to mate the new donor diesel to the Royal Enfield’s frame and box.

The engine brackets

Beautiful crafted stainless steel system

Initially Trevor cut, filed and drilled the design brackets, but the final were laser cut by an engineering in Worcester, based on templates by Trevor. Trevor had five of brackets made as this was cost effective. So tight the tolerances when fitting the diesel engine into the Enfield frame that was only a 1mm gap between the back of the and gear box. This gap was up with a gasket.

However the primary drive casing had to be for a Taurus diesel unit India, to achieve a perfect of engine to gear box. In the main shaft of the gear box has to be to one of German origin of the required

On cost grounds, Trevor has in used a Yanmar clone from China, which maintains is near identical to a diesel engine, but approximately cheaper!

The small diesel used, is a 406cc engine produces approximately 10 BHP, to a heady maximum of 3,600 It uses a direct injection with no heater plug. says despite the absence of a plug, there are never any getting the engine to start. hot the engine always starts on the kick and from cold more than 3 kicks on the Enfield’s kick start are

Unfortunately space did not allow to retain the modern electric but this is a green motorcycle all, so a kick start a fitting way of starting the bike.

was advised that beefing up the would be a good idea, due to the torque of the diesel engine. So he has a new five plate clutch, the as fitted when pulling a car.

The engine casing matching gloss black

The filter, stop lever and rack arrangement

Trevor did not to alter the frame of the bike, accommodating the electric start have necessitated; so that at any the original Royal Enfield engine could be reinstalled.

has yet to fully prove that the Chinese clone engine be a reliable choice, but 700 miles of free riding seem to say it be.

All the electrics are as on the new diesel engine, but found it straight forward to these into the Enfield’s loom.

No significant changes necessary for the fuelling, the Royal petrol tank being out and filled with 100% which is fed through a Kubota

It has taken Trevor an amazingly period of time to achieve green miracle. He stated the in January 2007 and finished the in August 2007.

Trevor had the the hand made stainless exhaust system, crafted by Leonard of Bristol. This had to be designed to accommodate the exhaust position of the diesel engine.

The hardest technical challenge was the engine to accept a motorcycle as the means of increasing the fuel the engine and acting as an accelerator. the diesel engine chosen not have a governor its power is by small balance fly weights and a of springs which pull the up and down.

However with the addition of two springs Trevor this overrode the fly weights and the bike to smoke heavily as to fuel was being introduced. For motorcyclists not familiar with engines (many of us I’m the rack opens or closes a which regulates the fuel from the fuel pump.

One to appreciate that these diesel engines are generally to run at a fixed revs of between to 3,600 RPM all day long, rather the variable rev requirements of motorcycle so it’s very easy to fuel the engine for little in power output. Hence it was that Trevor got the action of the correct, so that more can be fed into the engine in the right to achieve a smooth increase in with most, if not all of the bio-diesel being burnt.

Trevor has settled on a combination of three of the right tension, there is a spring that initially the rack in tick-over position so the can be started. The further two springs utilised to make the engine However Trevor has had to add a new cable and to the engine which in fact as a shut off cable to kill the when it’s needed to the engine. This shuts the off, cutting the fuel

However the former petrol lever and cable has been as this is no longer needed.

The of the stop lever is the only addition to the normal motorcycle

Royal Enfield Bullet 350 Classic

I’m sure many want to know how the performance from the petrol engine. The 500cc iron-head petrol depending on the gearing used, top out around 75-80 MPH.

claims that bike happily cruise along all day in gear at 50-55 MPH and will top 60 MPH; however Trevor has had to the size of the gear box sprocket a 17 to 18 tooth gear to achieve the plus top speed.

The bike 45 to 50 MPH in third gear, before up into top is required. Trevor that the single cylinder pulls the bike away rest cleanly. But what was at pains to express is the sheer factor and pleasure that from riding his unique creation.

Plus the enhanced the bike gets where it is parked or ridden is a bonus.

had set himself a performance bench of the BSA M20, but Trevor is happy the performance offered by his diesel Royal Enfield exceeds The BSA M20 was a 500 cc side-valve engine-ed BSA. started just before the World War and continued throughout the war

126,000 M20’s were for the military alone.

The engine on 100% bio diesel supplied by Bio Fuels Ltd. When was running in and testing he has been an amazing 135 to 140 MPG. However he normal usage MPG to be between 160 to 170

Careful use of the throttle could this figure towards 200 giving the bike the phenomenal range of approximately of nearly 700 before the tank needs

Surely has to be one of the greenest motorcycles in the particularly as this amazing grail of MPG is also being using 100% bio-diesel?

One downside though is the increased noise. Trevor claims it like a cement mixer down the road. Trevor let me briefly ride his green at the conclusion of the interview for this and yes it sounds like a cement

Additionally the smell from the is not your normal diesel but more akin to the smell your local fish and shop, thanks to the bio-diesel. many may prefer this

The finished project

I can state the finished project has been to a very high standard and not in anyway look cobbled in-fact so slick is the end result you think the bike rolled off the line in India.

However is not content with producing one miracle he now intends to convert a twin and a three cylinder motorcycle to run on corresponding diesel He is thinking of converting a BMW R75 or R80 to run on a three diesel engine from Kubota, Yanmar or Daihatsu as his project.

Additionally Trevor is happy to other budding diesel with help and advice and even a kit to convert their Enfield. Trevor estimates the of conversion is about Ј1,200 the cost of the donor Royal machine. He would also be if any far sighted entrepreneur wanted to the idea forward to commercial So if you’re interested in making own green miracle or helping create more, please an email with full via or by email .

Article and by Jon Booth — The UK Biker Site. Note all figures, weights and technical are as claimed by the respective manufacturers

to Trevor Williams — for his and co-operation in the writing of this

Royal Enfield Bullet 350 Classic
Royal Enfield Bullet 350 Classic
Royal Enfield Bullet 350 Classic

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