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Post Info TOPIC: Simons 350 build


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RE: Simons 350 build
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kick start diagramme.png



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Great, thanks Steve. Circlip, washer, gear, washer, circlip.

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Making gradual progress, mostly been stalled by other jobs around the house!

Got the bottom end fully assembled after a couple of schoolboy errors that necessitated some backwards steps.
1. Needed to helicoil a couple of generator cover bolts as the threads had been stripped.
2. Needed to re-remove the clutch cover and pressure plate to install the clutch arm, cos I put that in the RH side box so only got round to finding it at that point when I'd buttoned up both side covers! And then realised that I need to take the generator cover off again to get access to the shift arm locking bolt! Doh! (read the manual more thoroughly as it's mentioned in there of course!)

20210620_153710.jpg

Trimmed the bottom gasket to fit, and then inserted the rings into the piston and the piston onto the barrel using my ring compressor to avoid any bloody fingers. Bit awkward getting the gudgeon pin clips in place in that position, but got there and the piston and barrel are now in place.
20210620_162126.jpg
One question: the arrow on the piston should point forwards (exhaust side) I think yes?

20210620_162134.jpg



-- Edited by Padowan on Sunday 20th of June 2021 04:37:08 PM

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One question: the arrow on the piston should point forwards (exhaust side) I think yes?

Yes - that's right.  I recall that the cutouts for the valve are bigger on the carb side to allow for the bigger inlet valves smile

Good progress - know what you mean about two steps forward etc. I get ****y having built quite a few engines and don't follow the manual. I then find a spare washer on the outside that should have gone on the inside disbelief



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She lives!

After a bit of a delay in finding the time to work in the garage and then assembling the bike to find a leaky carb that needed some bits from Steve and then some careful sanding to seal the pumper cover, I got the carb back in, filled with fuel put a smidge of choke on and then gingerly hit the starter. Literally 1 turn over and she fired up into life. She's sounding a little less like the sewing machine she used to, a little more whiney perhaps, but I'll gently start to break in the engine and get an oil change in before casting any judgements on there being an issue.


Next job after that will be to start playing with the jetting, I'm running standard jets at present just to get her up and running, but will get some jets and start playing.

 

20210809_213314.jpg



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Great news Simon. Well done!
Less like a sewing machine? Well you have basically added another engine to the one you already had (in terms of capacity at least)!!
What tail pipe is that? Looks more open than a Motad, or is there some dB killer action going on out the back there?
Have a beer now!
Cheers,
Simon.

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I actually have no idea what the pipe is, it was a lighter stainless one that Steve had knocking about that I said it take off his hands as there were no Motads about at the time. It sounds very nice, a bit louder than standard, but not rude. It does have an insert in at the end, so it's not as open as an FMF for example, I think its probably comparable to a Motad...

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Good work Simon! It actually came together quite quickly at the end biggrin

It will soon be trail riding weather when the overgrowth has died back, and the holidaymakers have gone home, so time to run it in on the road in the meanwhile wink

Brian



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Finished assembling the bike too continue the break in with a gentle little around the block trying to keep the revs up and down and not bogging it down. I think the whine is a bit less, perhaps its just things bedding in.  @Simon, here's a pic of the end of my anonymous pipe, as you can see it's not super flowing.

turn right.jpg



-- Edited by Padowan on Thursday 12th of August 2021 08:38:41 PM



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Interesting. Wonder what pipe it is?

Don't be too gentle running-in, and get up to full running temperature. Enjoy!

Simon.

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