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Old 03-30-2013, 12:28 PM   #31
Low594
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Looking good!
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Old 03-30-2013, 12:35 PM   #32
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That looks like ton of fun. BTW they sell mandrel bent tubing so you don't have to make all those cuts for your next exhaust.

something similar must be in the UK

http://www.mandrel-bends.com/catalog...l-16-gauge-53/
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Old 03-30-2013, 12:38 PM   #33
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Quote:
Originally Posted by sailah View Post
That looks like ton of fun. BTW they sell mandrel bent tubing so you don't have to make all those cuts for your next exhaust.

something similar must be in the UK

http://www.mandrel-bends.com/catalog...l-16-gauge-53/
Thanks for that, I'm sure they do but mine cost a total of about 40, I have the satisfaction of knowing I made it and it just looks cool
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Old 03-30-2013, 01:06 PM   #34
Ironhead
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what do you get if you combine and RS 125 and a 640 LC4???

The British version of "Hold My Beer And Watch This"???
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Old 03-30-2013, 03:08 PM   #35
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Clocks

I opted for the koso clocks because they come with their own temperature sensors and they look awesome
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Old 03-30-2013, 03:13 PM   #36
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Fairings

from this

to this


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Old 03-30-2013, 03:16 PM   #37
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Finished the exhaust







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Old 03-30-2013, 03:19 PM   #38
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I got a seat cowel too





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Old 03-30-2013, 03:20 PM   #39
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Got the tank back too



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Old 03-30-2013, 03:22 PM   #40
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Headers

Because the headers were a little close to the cooling pipes i wrapped them

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Old 03-30-2013, 03:28 PM   #41
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First proper run

So it ran properly for the first time with a complete exhaust system. and it made a horrid knocking noise.
http://www.youtube.com/watch?v=uSKuxUwipiQ
so I opened the top and found that the needle bearing had collapsed and caused this
http://www.youtube.com/watch?v=aqR0PApUiHs
Also knackered the camshaft. So much love for the T**t that sold me this engine. I've ordered a new camshaft and relevant bearings/ seals. It'll get done eventually, most likely in summer due to looming exams. This is my current state.

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Old 03-30-2013, 07:17 PM   #42
Donkey Hotey
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Originally Posted by muttley92 View Post
That was considered. It's 3mm stainless 304 on both sides, since the engine deadweight is only around 40kg max and majority of the weight is on the rear mount I think it will be just fine. But I'll keep an eye on it and if it should crack I'll find a solution.
Dead weight is nice. That's your statics class. Have you taken dynamics? What about when that thing starts up and flexes those welds to death? The LC4 is known to be a paint shaker. I'd seriously rethink the design of that front mounting system.

Also: the LC4 doesn't need an oil tank at all. The original engines didn't have one, nor did the strictly off-road models. The oil capacity was to add some extra oil to wear out and burn, as well as a place to mount an external oil filter. On the original design, the filter was located where the e-starter lives now.

Have you considered something like an automotive remote filter mount and using the largest oil filter you can find? That should add 500cc of capacity and a filter without having to worry about that oil tank failing.
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Old 03-31-2013, 02:52 AM   #43
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As mentioned before, I am well aware that these engines vibrate. I have done dynamics and vibrations, I'll keep an eye on it and if it cracks I'll do something different. Oil filters tend to be round. There isn't much space, the tank I've made fits nicely in the frame and there's no reason it should fail, there are several brackets on it that I just don't have photos of. But you get the just. The extra capacity won't hurt and it will lower the oil temperature. Can't be a bad thing. At the moment I'm more bothered about fixing the engine...
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Old 04-02-2013, 12:46 PM   #44
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You've got some skills mate

Ben, I had no idea you were fabbing so much up yourself! Fair play mate, you've got some skills.

I'm pretty jealous at how well yours is turning out. Liking the black and orange colours.

I hadn't even thought of wrapping the headers to save the rad/cooling system. Definitely going to be doing that I think.

Keep up the good work (time permitting).
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Old 04-02-2013, 05:17 PM   #45
clintnz
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That is some great work, that thing is going to be a tiny monster when it's done.

Quote:
Originally Posted by Donkey Hotey View Post
The LC4 is known to be a paint shaker. I'd seriously rethink the design of that front mounting system.
.
x2, no big deal though, IMHO all those tabs need is a rib welded down one side to stop side-side flex. For a few grams of steel you'd gain a lot of strength.

On the oil system, if you are using the standard circuit, be aware that the big end bearing will be getting no oil while your tank fills up. That's why it's standard practice on the 640 to fill the frame separately & bleed out the air so the crank gets oil asap.

That cam bearing failure is a bastard, haven't seen that before. I've always replaced that bearing & the other end one on mine when doing the cam followers (which are known to wear out) cos they're cheap but they've never been worn. Good luck with getting that sorted & I look forward to further updates.

Cheers
Clint
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