Sunday 30 March 2014

No idea what to do next

Pushrods are not bent, they both go up and down when motor turned over so nothing seized there.
I have the name of a contact who has installed exactly the same 12v contactless dynamo on an MZ. I'll contact him to find out how this is set up to get timing right. In the mean time I hope I can source a new rocker arm when I am at Simson this week. How I am kicking myself for not buying the AWO Sport non runner barn find that went for £550 on E Bay in Cambridge. The cylinder head alone would have been worth it.

Valve gear all ok



Piston and barrel OK so not blowing by here



Inlet port



Exhaust port



Siegfried head off again

Just as before all this work sooted up exhaust valve

Saturday 29 March 2014

Power Dynamo serial number



Power Dynamo number and arrow



Dynamo actually rotates in opposite direction to arrow



Dynamo pick up at ZP



Here is the pick up on the rotating dynamo



12V contactless Power Dynamo conversion

But Siegfried has no contact breakers. So how to check timing? 

Another riddle

Here is the ZP Zuende Punkt - 10 degrees before TDC at which contact breaker points should open for correct ignition timing.

Exhaust rocker broken

Also the exhaust rocker arm is stiff to rotate whereas inlet moves freely. Never noticed this before. Another clue? 

Inlet OK



Nearest valve gear is exhaust with push rod tip showing where rocker should be



Push rods OK



Valve gear looks OK





Broken exhaust rocker arm

So this is what went BANG! No idea why. Will take to Suhl on Thursday to show Simson technicians. No idea how to replace.

Wednesday 26 March 2014

Siegfried goes BANG !

Happily set off for work today on Siegfried only for the bike to go BANG loudly and stop running. Took off the rocker box cover to find the exhaust valve has seized. 

As Hermann Goering once said " Meine Herren, Sie haben mich nicht nur entauescht sondern verraten " ( To Luftwaffe chiefs including Adolf Galland upon realising the battle of Britain was lost )

Gentlemen, you have not only disappointed me, you have betrayed me !

So now what ? Well I have located the only other roadworthy Simson AWO Sport in the UK and it is for sale. I may buy it to make one good bike out of 2 as that one has had a nut and bolt total engine rebuild.

Saturday 22 March 2014

Hi carb , low carb

What i meant to have put was that the carb needle was set too high it is now at its lowest setting so minimum fuel through main jet.

Sent from my iPad

Siegfried on the road again at last

At last Siegfried is back on the road again. The bogging down was a combination of too low carb needle + new exhaust stifling the engine. So set needle at lowest + replaced new exhaust by the old one and away we went. No more gasping for breath or overheated exhaust. Nice and loud too. Best of all spark did not soot up so we are on the right track.

Tuesday 11 March 2014

Siegfried - the Final Solution?

And here is the latest item in my carburettor war with Siegfried. He reluctantly starts on the all new carburettor, runs fine then cuts out and will not restart. On the 2nd new carb as now fitted there is no longer an overflow problem from the float bowl - the bleed hole at the top is now blanked off. Hooray. The problem lies in trying to defy gravity. The original carb fed fuel in from the bottom of the bowl. The new carb feeds it in from the top. The outlet spigot on the original fuel tap sits lower than the inlet spigot on the new carb. Hence the fuel pipe has to go in a circle around and over the top to meet the inlet spigot. I suspect that lacking a fuel pump this is causing an air block and stalling the engine. Thus at great expense this original but refurbed tap with horizontal outlet. My hopes now lie with this sitting parallel with the top of the inlet spigot thus needing a short length of fuel pipe with minimal uphill gradient. Who knows until I fit it if it works or not.

New tools luverly

Loving my new through bolt Lidls socket set, perfect for bikes at £16.99.

Random thoughts on the Isle of Man

Roundabouts are a relatively new innovation on the Isle of Man having been introduced some 15 years ago for the first time and proliferating ever since. However, the population of silver surfers seems to have outpaced their expansion with the result that many drivers were either  never trained on how to negotiate roundabouts in the first place or have subsequently forgotten. My heart stopping experience last week was that despite road markings telling them so the average local driver has no concept of Give Way to the Right on roundabouts. I had 2 incidents of drivers coming straight out, one whilst looking left and the other, more worryingly, whilst looking straight at me but coming straight out nonetheless.
The other novel experience was the Manx Turn. On the basis that many farm entrances and house drives are blind entries to main roads from between either hedges or dry stone walls the locals habitually make turns off a main road in a shape resembling that of the top of a coat hanger or question mark. In other words they indicate, say, left then at the last moment swing out right over the centre line in order to make a tight left handentrance. 
Now, if this a tractor or long vehicle you would suspect a manouevre like this. The trouble is that drivers of ordinary cars do it all the time regardless of whether the entrance or turn off needs it.

Sunday 9 March 2014

Marshals training day Bedford

On the basis that the best way to conquer fear is to face it I gulped when nominated as Race Control for the training incident which concludes training. I really enjoyed it as handling the radio is much more natural when things are going on and you don't think about how to use it. We had some signal drop outs and blustery sound so it was all quite realistic. We all worked as a team with Race Control and Airmed indoors unsighted from the incident which was a rider off at The Gooseneck. RC had to coordinate with the Deputy Sector Marshal on scene and Airmed, who were sitting opposite me! , to establish number of casualties, nature of injuries and evacuation whilst gathering information on clearance of debris and status of flag use. It was all very realistic with the on scene team treating the broken leg of the sole casualty, strapping him onto the stretcher and between us all getting him on his way by helicopter to Nobles in 10 minutes plus clearing the incident site. The trainers seemed well pleased and we were all relieved that it all went without any reported major blunders. Great fun and an excellent exercise plus we all passed the course! 

Saturday 8 March 2014

Marshals training day at Bedford

Great day topped off by meeting 2013 Classic TT 500cc winner Ollie Lindsell. He will be on the Royal Enfield this year with Ian Lougher riding the Paton as a swap over from last year. Ollie is going for a 109mph lap as fastest single cylinder, he has already done 106mph and reckons 110 can be done! From another source I finally found out why the rider I had to black flag last year was black flagged and why he took so long to stop. It turns out that he thought he was being pulled over for a broken clutch lever which he had fixed in the pits so he did not want to stop. In fact he was 40 mph slower in a straight line than anyone else and thus a hazard. The reason was that he had blown his race engine but had fitted a standard road bike engine in its place. When the other riders blasted past him they were so much quicker he thought they were the top bikes whereas he was just dog slow and didn't realise it. He was black flagged all the way from the 13th milestone until the Sulby straight where a marshal stood out in the road with the black flag to finally stop him! 


Marshals training day at Bedford

Great day topped off by meeting 2013 Classic TT 500cc winner Ollie Lindsell. He will be on the Royal Enfield this year with Ian Lougher riding the Paton as a swap over from last year. Ollie is going for a 109mph lap as fastest single cylinder, he has already done 106mph and reckons 110 can be done! From another source I finally found out why the rider I had to black flag last year was black flagged and why he took so long to stop. It turns out that he was being pulled over for a broken clutch lever which he had fixed in the pits so he did not want to stop. In fact he was 40 mph slower in a straight line than anyone else and thus a hazard. The reason was that he had blown his race engine but had fitted a standard road bike engine in its place. When the other riders blasted past him they were so much quicker he thought they were the top bikes whereas he was just dog slow and didn't realise it. He was black flagged all the way from the 13th milestone until the Sulby straight where a marshal stood out in the road with the black flag to finally stop him! 

Thursday 6 March 2014