X9 Owners & Riders Club
October 15, 2025, 13:30:47 *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
 
   Home   Help Website Gallery Login Register Donate  
Pages: [1]   Go Down
  Print  
Author Topic: X9 evo 125 cold running  (Read 4788 times)
allen m
Cafe Racer
***
Offline Offline

Posts: 390



« on: April 23, 2018, 20:21:18 »

Hi All
My X9 Evo 125 (06 reg possible 05 model) is very reluctant to to pull away when cold. I found some comments in F.A.Q. from some years ago, but no conclusion. It starts OK, in a few seconds if used regularly. If left standing for several weeks, turn on and run started for 7-8 seconds then give the throttle a couple of full twists and it normally starts, if not another twist after about 5 seconds will do it. I have the big 14ah battery for a 500  fitted.
However it has no 'get up & go' till it's been running for several minuets. This was mentioned in the original comments but there does not appear to be a fix, is this correct?
I have completely cleaned the carb (fixed & removable jets), fitted a new cold start unit (but sure the original was OK), petrol filter and pipe, thermostat and plug.
The situation is made worse by having a steep up-hill from home.
Having had over 30 cars & 20 bikes I am still beat on this one.
Comments appreciated even if no know cure.
Regards
Allen Morgan
Logged

Allen Morgan. First time scooter rider (X9 Evo 125cc Imperial Blue 2006 reg) since January 2014 after being on Bikes from 50cc to 650cc since 1958 (and cars since 1962).
Dave Milnes
Administrator
Old Timer
*****
Offline Offline

Posts: 21327


Millom Cumbria


« Reply #1 on: April 24, 2018, 07:10:01 »

Not sure if ever there was a cure. Might be worth checking if the thermostat for later models such as the MP3 or the Xevo was any higher temperature. There could be a slower opening aspect to these as well that aids initial warm up speed. There may be a superseded part for the original one listed for the X9.
Blanking off the rad achieves nothing so I wouldn't bother with that idea.
Logged

2021 Honda NSS750 Forza
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Lake District 2024, Durham 2025
roadster
Cafe Racer
***
Offline Offline

Posts: 413



« Reply #2 on: April 24, 2018, 07:42:27 »

No engine can develop full power till it reaches normal operating temperature, at least for the combustion chamber and piston area. So a steep hill on a 125 when cold is always going to be challenging. Anything you do that richens the mixture would help but of course will also affect general running. Conversely anything such as a less restrictive exhaust or air filter would probably make it worse. If the cold start device is the type which has a needle you could try re-profiling the needle or you could enlarge the jet that the needle fits in to. A bit radical but worth a shot if you have spares.
Logged
Dave Milnes
Administrator
Old Timer
*****
Offline Offline

Posts: 21327


Millom Cumbria


« Reply #3 on: April 24, 2018, 12:29:47 »

The original X9 125 didn't have this problem but the Evo did. I think they changed the carb to a larger bore and adjusted the jetting to lean it out a bit. I guess it was to get through the newer Euro2 emissions which were introduced about the same time.
Logged

2021 Honda NSS750 Forza
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Lake District 2024, Durham 2025
Gav
Cafe Racer
***
Offline Offline

Posts: 400


Suffolk


« Reply #4 on: April 24, 2018, 13:21:55 »

Hi All
My X9 Evo 125 (06 reg possible 05 model) is very reluctant to to pull away when cold. I found some comments in F.A.Q. from some years ago, but no conclusion. It starts OK, in a few seconds if used regularly. If left standing for several weeks, turn on and run started for 7-8 seconds then give the throttle a couple of full twists and it normally starts, if not another twist after about 5 seconds will do it. I have the big 14ah battery for a 500  fitted.
However it has no 'get up & go' till it's been running for several minuets. This was mentioned in the original comments but there does not appear to be a fix, is this correct?
I have completely cleaned the carb (fixed & removable jets), fitted a new cold start unit (but sure the original was OK), petrol filter and pipe, thermostat and plug.
The situation is made worse by having a steep up-hill from home.
Having had over 30 cars & 20 bikes I am still beat on this one.
Comments appreciated even if no know cure.
Regards
Allen Morgan
I owned a 2003 Aprila Atlantic for over 9 years, and got silly laughing smileys on this site for proferring some things theoretically based on then 40 years on/off two wheels. To be fair having later tried such it didnt make a halfpenny's worth of difference.
Also when I suggested I just left it ticking over for 2 or 3 minutes was told by JinC, I shouldnt do that as it affects the cold running gubbins,he reckoned his 125 was full power at the end of his Street and John Thomson a former dealer said it was valves, but there were umpteen folk moaning about the same problem.

As I had the luxury by then of not being reliant on it and apart from a new 14 amp battery and new tyres that transformed its former wayward handling, I just put down to it being a Scooter and my lack of experience of such.

Once warmed it would restart and not bog down till the next time, cruise with very many stone aboard at 65 and once even saw an indicated 70+ downhill with a following wind.

Apart from the aforementioned it never went wrong, but I had got back into the geared bike scene, after some time waster on Fleabay a genuinely interested party ( the guy had had a knee op)wanted it but couldnt raise the total asking price, I agreed to take a Hyosung 125 VTwin and cash for it. Even tho I already had a Cruiser bike, did part of the Air Ambulance Essex run on it and ran about on it then after a year or so sold it to a young fellow who came up by train and road it back to Bromley.

Combined even with the online auction fees inclusive with the cash my way finished up doing well on the deals.

When I saw My current Atlantic 500 I bid for it took a trailer up to March, stayed over in a self contained anex nearby and trailered it back to Harwich the next day, ironically I later bought a Sachs V Twin from very nearby but picked that up and back in a day.

Anyway the 500 had a problem made clear by the seller it stalled at very low revs and on one occassion luckily a lovely day down by the Quay awaiting breakdown cover, the battery had flatted. The recovery guy reckoned it was the injector but after I replaced that  checked all the pipe linkages, fitted an iradiam plug, changed oil and replacement Malosa Oil filter it was just the same , then I sort of lost interest and wemt off touring on bigger bikes.

Anyway this year I bit the bullet and spent 500 pounds getting it sorted, The wiring was apparantly ameuterishly hashed, the tyres flat, new fork seals were fitted as well as a new battery and so on, apparantly the valves were spot on but after those faults rectified  and came off the diagnostics, just one was left, the Dealer admited they nearly gave up but the mechanic wasnt to be beaten and found a crimped wire to the return valve the culprit( to be honest I probably would never have found that in a million years)then he test ran it and the battery flatted, fortunately they had a rectifier ordered for a Gilera Nexus that hadnt been needed after all and fitted that for free.

Ok on top of the 600 I paid for the ol gal it is still less than admitedly a pristine 500 Sprint on sale locally, and whilst I guess the Sprint is probably more agile to What I call USA version and that mechanic whose labours  were I think all in all a good investment, said its just like riding along in an armchair, she can be hussled but it is a little light on the front but that limiting factor maybe down to the part worn front tyre.
Who knows though maybe if my Ape Mille currently up for sale sells, and that Sprint is stil up for grabs9hrm the idea is to cull numbers.

Anyways sorry to kinda hyjack your post but sorry my advice is to run your scoot for a few minutes, it did no harm to Leader engine d 125.
Logged

allen m
Cafe Racer
***
Offline Offline

Posts: 390



« Reply #5 on: April 28, 2018, 13:45:54 »

Hi all
Thanks for the replies. I am not going to try and do anything about it, it's just inconvenient but as most of my riding is in the warm weather not too bad. Next thing now is the MOT.
Thanks again
Allen Morgan
Logged

Allen Morgan. First time scooter rider (X9 Evo 125cc Imperial Blue 2006 reg) since January 2014 after being on Bikes from 50cc to 650cc since 1958 (and cars since 1962).
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!