The engine of my dreams

Who would like to hear about my summer holiday?

What? Nobody?

There is a cry from the back of the internet –  “Get back to work you lazy so and so” and I suppose that sooner or later I must.  In the meantime though I’ve been playing with Little Project.   Just like in the Bobby Ewing post, as I lazed around the pool (did I mention I’ve been on holiday?) I decided that my last couple of days before going back to work would involve dropping an engine into the frame and riding off into the wide blue yonder.

You will remember that I have approximately four engines.  We need to generalise slightly here because there are four lumps of Tokyo’s finest bits of metal all with components missing.   A cylinder head here, an engine cover there, so the first challenge was to decide which of the four was to become the beating heart of Little Project.    Ideally it should be the original Little Project engine but rather surprisingly all of the nuts and bolts that hold the engine casings in place are rusted, rounded and/or sheared.   A couple of hours on the workbench with the impact driver did nothing to improve this so I’ve moved it to one side for one day when I am really bored.     The numerically astute amongst us will quickly have gathered that this brings us down to three engines.   Two with engine numbers starting CB125 and one starting XL125.

You’d think that when old Soichiro Honda issued his instructions to build a range of single cylinder 125 motorcycles he would have said something along the lines of “Okay chaps, we will build a trail bike, a trial bike, a sporty number, a commuter and then if we’ve any time left over we can knock up something for rounding up sheep, let’s use all the same bits and just stick different bits of plastic on them, oh, and just glue a bit extra on the forks of the off road ones so they’ve a bit more movement”.

Pah.

The manual lists twelve different carburetor types for the 125 engines alone.   The wiring system is different on the XL to that of the CT and the CB is different to them both.

Still, nothing ventured…   The XL125 engine does not have a cylinder head on it.  This isn’t necessarily a point to rule it out but when I have two engines that do then they are going to be favourites.   I checked the compression on the two CB125 engines (I did this really technically by putting a kick start onto each of them and turning them over whilst holding my finger over the spark plug hole) and they both seem to have at least some compression so it was a case of using one of these.   But which one?

After much debate with myself about the various benefits of this engine over that engine that included things like “This one has a wire coming out of the points and the other one doesn’t” and “this one seems to have some oil in it” I chose the cleanest one.  This was roughly based on the principle that somebody in the past may have loved it more.   Based on these principles, you probably wouldn’t want me to adopt you but we all have to start somewhere.

So I put on my (not even slightly) pristine overalls and extracted my polishing cloth from where I had left it (fortunately I sniffed it first, I’d previously used it to wipe up some battery acid so it probably would not have been ideal for cleaning the new Little Project motor) and got to work on cleaning up an engine.

Then I put it in the bike.   It looks like this.

IMG_1309

from one side and it looks like this from the other.

IMG_1310

Now I’m not saying for one minute that we’re finished.  But.  There’s an engine.  In Little Project.

Buoyed by this I decided to look more closely at the electrics.   If you ignore the fact that everything above a certain point has been sheared off then then the wiring loom is (sort of) complete.  All I have to do is work out where all of the bits from a CB125 engine plug into their respective CT125 slots and Bob’s your uncle (I’m not sure how well known that saying is, it may just have been used by my Father, but it means that everything should be plain sailing).   Oh, and of course I need some points, and an ignition coil.   These are minor points in the grand scheme of things though.  After all, there’s an engine in Little Project!

For the rest of the week I plan to scratch my head over the carb collection (sadly this doesn’t involve choosing pasta, rice or potatoes) and just possibly put attach the CT125 stickers that I have been putting off doing for several weeks.

Thanks for popping by.  I do hope you come back again.

I don’t want a pickle

I don’t want a pickle

I just want to ride on my motor sickle,
and I don’t want a tickle
I just want to ride on my motor sickle.

Arlo Guthrie, The Motorcycle Song.  You’ll find it here (and probably a dozen other places)if you like your Country and Western and enjoy a chuckle.

Sadly, I have a pickle.  I took a look at the engine shelf.   Oh lordy.  Little Project engine hasn’t miraculously unseized itself during the stay with better prepared engines.    The XL125 engine is missing a piston and a cylinder head.  Of the two CB125 engines, both are complete apart from the sprocket cover,  they’re obviously much sort after bits.    One has a carb fitted to it as well.   I’m going to go with this one being the best one and when the time comes I shall just drop it into the frame and turn it over to see what happens.   The challenge with all three of the HOAP engines is that they all belong to a bike with a rev counter.   Little Project has no concept of such an extravagance and the hole in the engine where the tachometer cable should go is blanked off.    I think that I actually want as much of Little Project engine in the bike as possible (it has all of the engine covers for a start), so my plan is to drain it of oil, turn it upside down, drill around the molten mass that used to be a piston and then remove the head and the attached piston in one go.   This should in theory leave me with a bottom end that is complete and free from nasty bits.   If the big end bearing looks okay then I shall stick a CB125 head and piston on it and try to work out just what the timing should be and how the carb should be set up.   If the insides of Little Project engine are in a shocking way then I shall split the crank and wrap the cases around a CB125 engine.   I’m sure that it can’t be that difficult!

The front wheel arrived!  The people at Central Wheel also sent me back a couple of the old spokes so that I could see just how bad it was and what a fine job they had done.   To be fair, they have done a very good job indeed.

Front wheel

See the rusty spoke sitting in the middle?   (You’ve no idea how challenging it was to get this picture without a reflection of me in the hub).   Wheel also has an inner tube and tyre attached to it.   Unfortunately the inner tube was somewhat compromised during fitting and so another must be found from somewhere.   We do like a challenge at Little Project HQ though.

Whilst I was talking to a man about an inner tube, we also discussed the MOT problem that I have.    For the bike to pass through its MOT the frame number much match the frame number on the V5 registration document.   The people who powder coated my frame masked off the little tin panel that holds the frame number but a bit of the masking peeled off during the sand blasting procedure and so this happened…

Frame number

That’s not really very clever.    It looks for all the world like I have tried to eradicate the identity of the bike by sanding off the frame number.    Mr MOT gave me several very good options.   If I can take the Little Project equivalent of a brass rubbing and the number is readable then that is just dandy.  Failing that, I can purchase a replacement VIN plate and stamp the numbers on myself.   That should prove to be an interesting little task as the VIN plates that are available do not match this one in any way shape or form and the VIN plate manufacturer tells me that an exact copy will be £125!

I did say in the last post that this week would all be about getting the handlebar equipment up to scratch.   Sadly I need some satin black paint to do so and I haven’t been able to find any so I fear a trip around a dozen different retailers is going to occur. On a positive note, I put some more bits of HOAP on eBay and 50% of them actually sold.   There are some bits there this week if anyone is looking for XL125k2 parts.   I’m sure they must be worth a fortune to somebody.

You know that moment when you press the wrong button on your keyboard?   Well I’ve just done that and published this post.  I’m not keen on editing after publishing (apart from this paragraph) so that is all for today.

Thank you for visiting.