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Twin Hs2 Throttle Problem

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#1 markking

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Posted 12 February 2019 - 05:15 AM

Hello again legends!
I need to pick your brains again. My twin hs2s keep getting stuck so the throttle is accelerating on its own. I need to give the pedal a little “blip” to sort it out pretty often.

I think it’s down to having the wrong throttle/accelerator retaining bracket (the one the bolts to the inlet manifold,I have this part on order) but also I think the linkages are incorrect also.

I have searched the forum and most parts suppliers including moss Europe with their amazing schematics but cannot seem to find the correct part/where mine is wrong.

I’ll attach some pictures of the current set up and would love your advice.

Thanks
Mark.

On closer inspection... why is it so difficult to upload photos?!
Apparently I need advice on this too.
Technology?!!? :)

Edited by markking, 12 February 2019 - 05:17 AM.


#2 Wiggy

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Posted 12 February 2019 - 11:53 AM

Create an Imgur account. (It's very quick.)

Upload pics. You can drag and drop if using a PC.

Copy the BBCode link and paste it into your reply.

Better to do it in desktop mode, rather than mobile mode (link in far bottom of your screen if using a phone) so you can preview the post first. (under 'more reply options'.

The link should take the form of:

[*IMG]yourlinkhere.jpg[/IMG*]

Without the asterisks.

#3 markking

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Posted 14 February 2019 - 05:07 AM

Hopefully this clarifies a little.

The carbs work well as does the accelerator (apart from the throttle sticking sometimes)

I'm not sure why or even if it's not correct, but the throttle configuration, with the additional "rods" don't look the same as any other twin carb set up I've seen on a mini. So I am assuming this has something to do with my throttle problem?

Any light you can shed and a f there's a solution it would be appreciated.

Thanks.

Attached Files


Edited by markking, 14 February 2019 - 05:11 AM.


#4 markking

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Posted 14 February 2019 - 05:10 AM

.

Attached Files



#5 johnv

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Posted 14 February 2019 - 08:42 AM

Can't really see from the images but disconnect the return springs and linkage and make sure the connecting bar is completely free running when it opens and closes both butterflies there should be no resistance anywhere. Check that there is oil in the dash pots, and the pistons move up freely and return fully on their own. If all that passes muster connect the cable and springs back up and check movement when somebody operates the pedal

Edited by johnv, 14 February 2019 - 08:43 AM.


#6 nicklouse

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Posted 14 February 2019 - 10:20 AM

looks way more complex than most setups I have seen. just trying to work out what is actually going one.



#7 nicklouse

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Posted 14 February 2019 - 10:26 AM

the cold start shaft looks like it is the wrong way round as the nuts are facing down not up.

 

the linkage that operates the throttle o would say has been taken of a different car as it is not needed  I would remove it and make up a new cable stop and move the cable connection directly to the spindle.



#8 markking

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Posted 14 February 2019 - 08:58 PM

Nicklouse I suspected this was from a different car entirely as I can’t seem to find anything similar at all.

As I said there are additional “rods” and brackets on the throttle shaft. From your reaction these are unneeded and making it more complicated than needs be.

Is it safe to assume the only fix would be remove the carbs take them apart and fit the correct bracket/arm.

Is this complicated or just a bit fiddly? The “arm” appears to “slide” on the the shaft and not bolt around it so as I said I suspect it’s carbs off and spanners out?

Any links or pictures of the correct parts needed?

Thanks.

#9 finch661

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Posted 15 February 2019 - 12:07 PM

have a look here (a few pages in)

 

http://sucarb.co.uk/...er-tuning-multi

 

shows the setup!



#10 markking

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Posted 17 February 2019 - 02:49 AM

Thanks so much finch.

Makes me wonder what these carbs were originally from.





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