Basket Cases

[Rod]

Forget the Montesa theme, Armstrong with a Hiro motor anyday. Looks awesome Darren.

[chippy]

Hi everyone,
Just thought I would post up another photo of the 242 rear shock and it is quite a long shock at 250mm eye to eye..

Darren, .. I haven't seen Cota 200's for a long time and now there is 2 being restored..

image.jpeg (1.33 MiB) Viewed 7999 times

Chippy

[David Lahey]

Hi everyone,
Just thought I would post up another photo of the 242 rear shock and it is quite a long shock at 250mm eye to eye..

Darren, .. I haven't seen Cota 200's for a long time and now there is 2 being restored..

image.jpeg

Chippy

Those are Gas Girlings and while they were popular shocks at the time, would not have been the original shockies on 242s, so may not be standard length for a 242

[Greg Harding]

Hi Everyone,

1462788028531.jpg (28.86 KiB) Viewed 6908 times

1462787996183.jpg (31.64 KiB) Viewed 6908 times

Big difference in rear sprocket size between the complete wheel and the spare hub?
Very envious of you guys collecting baskets and building bikes - I was out of room before I moved and now I have less!

Nathan, it sounds like you need a Mancave/Shed?
I like my rear sprockets to have heaps of TEETH!

started

1462787967533.jpg (119.78 KiB) Viewed 6908 times

Darren, what capacity is the Hiro motor and is it apart for a freshen Up?

1462789512197.jpg (137.25 KiB) Viewed 6908 times

1462789597612.jpg (107.34 KiB) Viewed 6908 times

OK back to 172 AKA KERMIT who ran pretty well at the Excellent LRMTC Trial yesterday, only a broken clutch cable and excessive fuel consumption to dampen things. Late last week I fitted a small Mikuni off a TF 100 as I was only able to roll start it with the standard Anal, everything looked fine with minimum clearance for the slide and it ran OK, but so hard to Start! I am thinking a 20 mm carby dumping straight into a 30 mm bore insulator is not very well thought out! With the Mikuni on the other hand, kick, bang and ride:That Simple! Cold starting an Anal with the tickler and trying to judge how much to flood it is a bit of a bad joke, now push down the CHOKE and it starts beautifully Cold!
The excessive fuel consumption was my fault as I had the float level too high and bouncing it up and down on rocks probably didn't Help!
Thank you JC1 for the carbies which gave me a leaner needle and more jet selections for fine tuning it.

Oh yes, I almost forgot:
Don't tell Chippy!

[darrenc]

320 Greg .just to make things more interesting working on two at the same time

[Kombivan]

That rolling start with the amal doesn't sound right maybe crankcase seals are stuffed? The other thing with the Mikini
i had one on one of my spanish bikes and I found a longer needle helped from another carb bit of trial and error there.

[Greg Harding]

Hi Everyone,

320 Greg .just to make things more interesting working on two at the same time

1463000175905.jpg (84.94 KiB) Viewed 5414 times

Darren, what year was it made and at 320 cc, it will make our next 300 plus cc Challenge even more diverse. I am wondering what the power delivery will be like and will it make both arms strong

That rolling start with the amal doesn't sound right maybe crankcase seals are stuffed? The other thing with the Mikini i had one on one of my spanish bikes and I found a longer needle helped from another carb bit of trial and error there.

Bill, I am no tuning wizard and someone may have been able to get KERMIT working better with the standard carby, but it was much easier to replace it with a readily available Mikuni. The crank seals seem to be working fine and I chose this carby as the mounts were easy to adapt but I am having some problems getting it right as I thought it was a bit rich on Sunday. JC1 gave me an almost identical carby with a slightly longer needle. Can someone help me with the right theory here? After experimenting with different jets and needle heights I am trying to explain this without getting it backwards as there are 5 positions for the clip, it ran the best with the needle at the lowest position in the top circlip groove.

Confused Yet? John's carby had a slightly longer needle and I have tried it with the circlip in the second lowest position which dropped the needle about 1/2 a position. This ran the best yet but has bought about a whole new problem, now when I crack it open in a higher gear, the clutch Slips! Until now, I hadnt thought this posible!

Should I source a smaller main jet and aim to have the circlip in the middle Position?

1463001969671.jpg (88.98 KiB) Viewed 5414 times

[David Lahey]

Hi Everyone,
will it make both arms strong

Should I source a smaller main jet and aim to have the circlip in the middle Position?

If you think it is still too rich at full throttle then yes smaller main jet.
Coarse indication for main jet is dying away as throttle gets near fully open (too lean) and 4 stroking at full throttle (too rich)
For finer tuning of main jet, depending on what oil and how much oil, you can sometimes judge how close you are to correct jetting on the main jet by looking at the density of the exhaust smoke while riding along at full throttle (good brakes or a steep hill can help here)
The clip position is not important unless you can't move it any further in the direction you want to move it

[JC1]

Greg, sounds to me like the clutch plates are slipping because its now making more power with better tuning & bigger carb

You haven't indicated at what rev range it's a bit rich - just off idle, rolling the throttle on in sections (ie low-mid rpm, depending how you ride), blasting up a hill or riding between sections (possibly higher rpm).

To add to what David says, as a general rule the needle position will affect it at lower-mid rpm range, but shouldn't affect it (much, if at all) at hi rpm where the main jet is dominant.

[Kombivan]

Hi everyone,
Just thought I would post up another photo of the 242 rear shock and it is quite a long shock at 250mm eye to eye..

Darren, .. I haven't seen Cota 200's for a long time and now there is 2 being restored..

image.jpeg

Chippy

Ummmmm 350mm or the 349 and 348 are 360mm the 247 is 330mm