alanbassman
2nd Class Ticket
Vespa PX125 Touring (2015) - Previously had a Vespa Douglas 150 from 1969 to 1971.
Posts: 18
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Post by alanbassman on Mar 25, 2021 16:36:26 GMT
Is the new SIP Road 3 ok for a 2015 Vespa PX125 CAT (Touring) or is it just for racing set-ups with bigger piston/case - my current SIP Road 2 needs replaced - and I have a bundle of idle and main jets if required.
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Post by adrian on Mar 25, 2021 17:07:51 GMT
Yes it will work fine on your motor, and its good you have a selection of jets to play with 👍
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Post by adrian on Mar 25, 2021 17:10:15 GMT
Should have said that put one on girlfriend's px125 replacing the expansion pipe it came with, and it goes so much better, and less noisy
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alanbassman
2nd Class Ticket
Vespa PX125 Touring (2015) - Previously had a Vespa Douglas 150 from 1969 to 1971.
Posts: 18
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Post by alanbassman on Mar 26, 2021 10:31:59 GMT
Hi Adrian thanks for that.
Will go for the SIP Road 3 and hope I do not have to meddle much with the jetting.
I have 4 Idle jets, 5 Main jets, and 2 Air Correctors, to mix and match, what fun lol.
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Post by adrian on Mar 26, 2021 13:10:54 GMT
Messing around with the jets is the job I hate most 😒
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alanbassman
2nd Class Ticket
Vespa PX125 Touring (2015) - Previously had a Vespa Douglas 150 from 1969 to 1971.
Posts: 18
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Post by alanbassman on Mar 28, 2021 22:59:50 GMT
Was a bugger getting the SIP Road 3 mounted and the downpipe hangs really low where it exits the front of the box.
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alanbassman
2nd Class Ticket
Vespa PX125 Touring (2015) - Previously had a Vespa Douglas 150 from 1969 to 1971.
Posts: 18
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Post by alanbassman on Mar 30, 2021 13:10:00 GMT
Still messing with jets, but feels like a more powerful capable acceleration and sound about town up to 35 mph - the exhaust is scraping the ground at times as it is too low set.
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alanbassman
2nd Class Ticket
Vespa PX125 Touring (2015) - Previously had a Vespa Douglas 150 from 1969 to 1971.
Posts: 18
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Post by alanbassman on Mar 30, 2021 18:46:36 GMT
BE WARNED, the very front of the downpipe U-bend is much lower to the ground (110mm ground clearance unladen) than the SIP2 or standard Vespa box, and currently scrapes when leaning into any corner, mini-roundabout, over humps and even the smallest of potholes
Checking the the SIP website photos, it is clear the U-bend is supposed to have this downward angled shape, due to how it is cut and welded to the main box.
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alanbassman
2nd Class Ticket
Vespa PX125 Touring (2015) - Previously had a Vespa Douglas 150 from 1969 to 1971.
Posts: 18
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Post by alanbassman on Mar 31, 2021 16:18:10 GMT
Not managing to find the right jetting combination for this SIP Road 3 on a Vespa PX125 CAT 2015 - add in the significant ground scraping problem, meant I had to revert back to another SIP Road 2 !
POST SCRIPT
Maybe the exhaust ground clearance problem was down to my heavy weight (115 kgs) and an already worn front shock absorber, (which I had to replace 18 months later).
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Post by adrian on Apr 27, 2021 16:38:28 GMT
An introduction works best for answer's, and it looks like a spark plug 🔌
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Post by davy17c on Apr 27, 2021 17:10:53 GMT
An introduction works best for answer's, and it looks like a spark plug 🔌 Point taken, done that, was just a bit worried about the colour, been trying to work out the ginger nut, custard cream thing. |
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Post by adrian on Apr 27, 2021 18:28:22 GMT
I am no expert, but looks ok from the pictures. Some get there carb dialled in on a dyno.
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