DieselBike.net

Hi Dave,
What engine is that?
It looks very similar to my Lombardini 7LD, certainly the flywheel is the same.
Cheers


Alex

Interesting read, and always interesting to see what honda are up to - obviously putting feelers out for wider applications of this injection system. It seems as though diesel fuel/veg oil is not an option though :-( At one time when I read biofuel I thought of veg oil not ethanol etc, some petrol i...

Hi John The fuel return should go straight into the top of the tank to allow a free flow with little or no 'back pressure'. The reason for this is to return uninjected fuel back to the tank in a 'loop'. I think the uninjected fuel is sometimes called 'spill' and if it dosent have a free path back to...

Hey there, Hmmmmm, look closely, I can see an HT lead going to the cylinder head. This bike looks very much like a 'virago' type cruiser to me. This could be one of those market testers that the Chinese do from time to time - I could be wrong, it'd be nice to see an 'out of the box' diesel bike bein...

Hi Mark Thanks for the info - I'm going the cvt route with this bike and just about to order the transmission from combidrive in wales. They said that their standard drives engage at 1600 rpm, so If I go with that and play with it from there - I remember your other threads when you were setting your...

Hey there
Just wondering what engagement speed to set the cvt at for a 14hp single cylinder project, I'm guessing it'll pull from around 1200RPM but not sure, what's everyone else running?
Cheers


Lex

Hi Clayton Just wondering - why did you decide to ditch the d950 3 cylinder idea? There should be plenty of those engines around as they have a wide variety of applications verything from gensets, small forklift trucks and even in some cars! (though I don't think many daihatsu charades were sold in ...

Hi Bob
I saw this lombardini on Ebay - don't know if it is any use to you!

http://cgi.ebay.co.uk/LOMBARDINI-6LD-43 ... dZViewItem

Cheers

Lex

Ha-Ha! Burnouts! I fear I may have let slip my hooligan tendancies!! :twisted: Actually only kidding I'm very sensible these days that's why I'm going down the diesel route :lol: Check the posts, you'll also notice that there are plenty of projects on your side of the pond too, maybe a bit of networ...

Hi Clayton, Have a look at the old threads in the technical section of the forum. Transmission is a topic that has vexed all of us!!!!!! You will find some good posts by Avery Frail on his D950 engined project that sounds similair to what you have in mind. you will also see how Sumo adapted his flwh...

Hi There, That's quite an ambitious project (big engine!) most of us here fall into two camps - single cylinder with crank accross the frame or twins and tripples with crank in line with the frame such as the 950 daihatsu engines and the smart engined bikes that you may have seen. Most of the large ...

Thanks Oil burner!
That yuasa battery looks ideal, it may even slot straight into my rather cramped underseat area.
Cheers


Lex

Hi Mark
Thanks for the battery info, you've confirmed my suspicion that 200 cold cranking amps are required!
I'm interested in the idea of a Harley battery though - What make is it? (oem)
Thanks


Alex

Hi there folks! Just a quick one about batteries, for those of you with electric start singles - what amperage have you found best? Just wondering what is the lowest cranking amps people are finding useable. Has anyone any experience with gel batteries? Batteries are heavy items, so in the interests...

That's a lovely looking bike you've built there!!!!!!
Cheers


Lex

Cheers Andrew and Sam for illustrating the two sides of the coin! I still think that petrol to diesel conversion is worth pursuing for the benefit of not having to chop up frames and fit comet drives etc. Although the expertise and equipment required to mill cylinder heads is not at everyones dispos...

Yes, perhaps the skimming idea is a little simplistic do not think you can convert a petrol head for diesel use by simply skimming abit. most heads are hemispherical and pistons relatively flat. most diesel engines have flat heads and pistons. I think also a petrol piston, small end, con rod or big ...

oh - nearly forgot, a governor of some description too!!!!!

Yes simple pushrods - would they be easier to adjust when the cylinder head was skimmed a few millimeters to increase the compression ratio? I've an idea to get an old seized 500 single to play with. do you think the new conrod and crank would really be necessary? I'd be tempted to beef up the beari...

Hi Andrew
Hmmm all good stuff, I'm going back onto the 'has anybody out there converted a petrol to diesel thread' as there is no point running the same subject accross two threads.

I've a good mind to get a seized 500cc single to play with!
See you on the other thread!



Lex

I wonder what he did with the conrod?
...And the crank and bearings?
Imagine it with a common rail type pump giving variable injection timing.



Lex

I like the idea of a common rail type set up where the pump provides constant pressure and the injector is 'fired' by solanoid valves, you could build a very simple ECU using the existing coil pickups from a petrol engine set up giving variable injection timing. Personally I would want to keep as mu...

I was just wondering about converting petrol engines to diesel, on this site there are conversions of a norton and an italian conversion too. Surely it would be easier to convert a bike engine as there are no transmission or alternator headaches, and it is already designed to fit a bike frame. Alrea...

Ahem, image shack thingy....
Here are some pics to aid my descriptions!

[img=http://img373.imageshack.us/img373/6621 ... fa8.th.jpg]

[img=http://img213.imageshack.us/img213/2382 ... ev6.th.jpg]



Lex

[img]/Users/alexpearson/Desktop/000_1423.JPG/Users/alexpearson/Desktop/000_1425.JPG

Hmm how do these image things work?
Anyway if they work you will see lucas generator and flywheel, the engine had a pull start option (I've never tried it though) so maybe I'm in with a chance.

Lex[/img]

Hey there! The best way round the continous rating for the bearings is to use the lucas style generator as I mentioned earlier, this was actually built to run constantly and has a pulley wheel on it. My Lombardini also has a pulley wheel on the flywheel as well as a toothed ring. On my Kawasaki GPz ...

Hmmm, Damn shame - I suppose a special combined unit would need to be constructed with all the machining that such an enterprise demands, I still love the idea though. If I could I'd use a starter, put propper bearings in, and use something like a selector fork and a servo to keep it engaged once th...

Hi there! Overspinning the starter is one thing.....I can control voltage and current by weakening the stator field/electronic regulation. Do you think that the overspin would do mechanical damage to the starter?, It will be under less load from the electromagnetic stator field as this will be weake...

Never mind the size of your alternator Sumo - you should see the size of my starter!!! :wink: Anyway it should be possible as I have used Lucas type generators (as fitted to old fords) as motors in the past. I was thinking of wiring the starter switch through a relay - Press to connect batery to sta...

Hi
I'm thinking about doing away with a separate alternator, and working on a method of having the starter permanently engaged for use as a generator once the engine has fired up. I'm handy with the electricals so no fear there
Has anyone done this before?
Cheers


Lex