Series 2 With Jet engine

[Storkfoot]

Happy days.

Are you bothered about a warning lamp or do you think you'll have enough site of the indicators themselves?

This is the view from the seat. I had the warning light mocked up at the side of the switch. So, if I am going to be checking the warning light, I’ll see the indicator flashing anyway.



I’ll see how I get on without a warning light, or buzzer.

[gaz_powell]

Nice job Paul

[Storkfoot]

The S2 was “finished” three weeks ago. I dared to take it to my son’s wedding for photographs but it hadn’t done more than a couple of hundred yards on the road.

When I came back from the wedding, I went for a ride and felt that the gear change was a bit notchy. I quickly diagnosed that the selector arm bush was worn out. Given that the engine had all the tell take signs of being a very well used and abused one, I kicked myself for not spotting this in the first place. I also feared that I may have to drop the engine to fix it

Thankfully, I have managed to replace the bush after stripping out the gearbox and rear hub.







On the plus side, the Fresco sounds fantastic

[Storkfoot]

I was putting the gearbox back in this earlier today. I noticed that the gear selector moved up and down on the Layshaft in each gear. I took the gear selector off and then found that the ball bearings were 7mm diameter and not 8mm as they should be.

Just thought I’d mention it as I dare say there are quite a few other undersized ball bearings inside layshafts if a dealer (I can’t remember where I bought the spring and bearings) has been selling the wrong size for some time.

[Storkfoot]

[dickie]

Beautiful. Is that on the Devon 150?

[Storkfoot]

Beautiful. Is that on the Devon 150?

No. Parkgate, South Wirral. Messing around with carburettor jetting again

[superhooper]

WOW, THAT LOOKS LOVELY!

[Storkfoot]

WOW, THAT LOOKS LOVELY!

Thanks, mate

The jetting needs work. It’s a Chiselspeed Stage 4 tuned 200.

PHBL25 - throttle valve 300 or 350, pilot 48, slide 45, AQ270/ D29 2nd clip, 102 main. Filter is a bgm elbow with Marchald filter. It feels good, revs up and down crisply except for occasional bogging when accelerating. Plug colour on plug chops all the way through the range are pretty chocolatey brown.

At this point, I am torn between (a) at some point in the throttle progression, it is too rich and the excess petrol is hanging around in the bellows to then be sucked in when I accelerate, or (b) the slide is too lean. If I had an easily accessible dyno nearby, I’d get the air/ fuel ratio checked out.

Next, I am going to try a 40 slide which, I suspect will see me leaning the atomiser, at least.

[bike grim]

Loving this

[Storkfoot]

I was struggling to get the engine to tickover readily. I had tried numerous pilots and air screw settings. I decided to swap exhausts, replacing the Fresco with a good old 42mm AF Rayspeed Clubman. This has helped a lot and, whilst I may lose a bit of power at the top end, the Clubman is probably better suited to the tune of the engine. The engine ticks over easily with a 48 pilot and sings through the rest of the throttle range.

It is still going on the Chiselspeed dyno next month though.

[Solid Air]

That's looking good, love the indicators a few posts back

[Storkfoot]

That's looking good, love the indicators a few posts back

Thanks. I have just had to replace the flasher relay but they are only £8 each. It was still working but the adjuster, to slow the flashing down, was being a bit temperamental.

Hopefully, I am going to get a small number of the housings cast in alloy later in the year. I have a local company lined up to do it in just need to borrow a set of originals.

[Storkfoot]

Just before this scooter was due to go on the dyno, I went to the rally at Seahouses on it. 500 miles. It ran really badly, especially on the way home. I had to keep it on the A1M and M62 as, below about 1/4 throttle it would die and be hell to restart.

On stripping the top end down, there had been no seize but the piston had a very matt appearance. On checking the barrel and piston clearance, it was discovered that it needed a rebore to 66.8 from 66.4!

I had seen some rust particles in the banjo filter which I just put down to it rusting a bit in the period between me cleaning the tank and it coming back from paint. I was wrong. Closer inspection revealed that I had done a very good job of cleaning the bottom 4/5 of the tank but the top was still dirty and rusty. Basically, the rust particles had been blasting my piston and barrel to bits.

Tank was taken out and properly cleaned whilst a new piston and rebore were sorted. It’s all back together now. It starts and ticks over well on a 50 pilot and I am now 12 miles in to running in.

User error

[Storkfoot]

Running in continues.

[Rich Oswald]

Running in continues.

That looks really cool Paul

[Storkfoot]

Running in continues.

That looks really cool Paul

Rich, you may have noticed that I am giving the Chiselspeed panel filter a try. Unlike the previous one I tried ten years ago (not a Chiselspeed one), this does not condense against the panel. That said, it also doesn’t touch the panel at the top

[dickie]

Looks great. Glad you sussed the issue, but it's got me wondering if I've cleaned my tank well enough on my old s2.

Maybe just 2 or 3 filters in series for a few hundred miles would help, but small particles might still get through?

Surprised I didn't notice your bike at seahouses as I was there all weekend.

[Storkfoot]

Looks great. Glad you sussed the issue, but it's got me wondering if I've cleaned my tank well enough on my old s2.

Maybe just 2 or 3 filters in series for a few hundred miles would help, but small particles might still get through?

Surprised I didn't notice your bike at seahouses as I was there all weekend.

It seems rust particles do quite easily just blast through the carburettor. The banjo filter did show signs of rust but nothing dramatic. Even when I took the petrol tap out, the filter in that was relatively okay. What gave it away, in the end, was me putting my finger in the neck of the tank and rubbing it against the roof of the tank. It was very rusty.

I wouldn’t try inline filters personally.

Seahouses. The scooter sat in the drive of our B&B all weekend until I had to try and start it again to get home

[gizmo]

Looks great. Glad you sussed the issue, but it's got me wondering if I've cleaned my tank well enough on my old s2.

Maybe just 2 or 3 filters in series for a few hundred miles would help, but small particles might still get through?

Surprised I didn't notice your bike at seahouses as I was there all weekend.

I can't remember who suggested it many years ago to me. Might even have been on here but I was told to put a couple of those really powerful little round magnets on bottom of petrol tank. They are that strong they won't fall off and in theory any metal particles will be drawn to them from inside the tank. I put a couple on near petrol tap. Not a clue if it worked as I never drained tank to look inside