LCGB Forums

The ability to post messages is restricted to LCGB members. Any questions contact us at lcgbadmin@googlemail.com

Mugello bad cold starting issue

Need help with a tuning kit, how do you tune your scooter, which kit should I choose, and all general tuning and modifcations questions are for in here.

Mugello bad cold starting issue

Postby TS1-200 » Wed Jan 17, 2018 1:33 pm

Have a big block 200 Mugello, 25mm dellorto, MB/BGM big bore, when started runs & ticks over nicely, but left overnight it is very difficult to start in morning, recently rebuilt new seals etc. I must admit have not finally jetted in carb, but the carb was ok on a MB RT kit 195/200, 98 m/j 53 pilot 60 choke, any ideas ?
TS1-200
 
Posts: 123
Joined: Mon Jun 02, 2014 1:06 pm

Re: Mugello bad cold starting issue

Postby coaster » Wed Jan 17, 2018 2:04 pm

Does it start ok if you hold your hand over the carb mouth? if so it would indicate that the choke is not operating properly. I had a similar problem on a TS1 which turned out to be the cable nipple had come out of the recess in the chock lever :roll: :oops:

Also, always keep the throttle closed until it fires up, don't wring the throttle whilst kicking.
User avatar
coaster
 
Posts: 2647
Joined: Fri May 30, 2014 1:00 pm
Location: Norfolk, Flying 8 Balls

Re: Mugello bad cold starting issue

Postby lofty » Wed Jan 17, 2018 2:22 pm

air leak?
lofty
 
Posts: 118
Joined: Thu Jun 05, 2014 4:05 pm

Re: Mugello bad cold starting issue

Postby mr mugello » Wed Jan 17, 2018 5:45 pm

Slack choke cable
mr mugello
 
Posts: 113
Joined: Tue Jan 31, 2017 7:07 pm
Location: Great Yarmouth

Re: Mugello bad cold starting issue

Postby TS1-200 » Wed Jan 17, 2018 6:00 pm

As far as I can see the choke is working correctly, would a bigger choke jet help
TS1-200
 
Posts: 123
Joined: Mon Jun 02, 2014 1:06 pm

Re: Mugello bad cold starting issue

Postby Scooterlam » Wed Jan 17, 2018 6:21 pm

Do you turn your fuel off over night?
Scooterlam
 
Posts: 1377
Joined: Mon Jun 09, 2014 10:59 pm

Re: Mugello bad cold starting issue

Postby TS1-200 » Wed Jan 17, 2018 8:30 pm

Yes
TS1-200
 
Posts: 123
Joined: Mon Jun 02, 2014 1:06 pm

Re: Mugello bad cold starting issue

Postby mr mugello » Wed Jan 17, 2018 8:44 pm

TS1-200 wrote:As far as I can see the choke is working correctly, would a bigger choke jet help
Have you tried pulling choke on by pulling the cable by hand rather than flipping choke switch. Slight bit of slack in cable may not be lifting plunger up enough, when cold.
mr mugello
 
Posts: 113
Joined: Tue Jan 31, 2017 7:07 pm
Location: Great Yarmouth

Re: Mugello bad cold starting issue

Postby MickYork » Wed Jan 17, 2018 8:54 pm

try a 70 choke jet.

might be worth checking the timing ? do you know the settings ?
MickYork
 
Posts: 1476
Joined: Sun Jun 01, 2014 8:37 am

Re: Mugello bad cold starting issue

Postby TS1-200 » Thu Jan 18, 2018 12:43 am

18 deg. BTDC, the choke is lifting ok, it clears the hole, will try a 70 choke jet
TS1-200
 
Posts: 123
Joined: Mon Jun 02, 2014 1:06 pm

Re: Mugello bad cold starting issue

Postby Fast n Furious » Thu Jan 18, 2018 3:20 am

Make sure you only have one type of ignition suppressor fitted. Either the plug cap or the plug itself but not both.
User avatar
Fast n Furious
 
Posts: 1502
Joined: Sat Nov 19, 2016 3:56 am
Location: York

Re: Mugello bad cold starting issue

Postby HxPaul » Thu Jan 18, 2018 10:56 am

It should start ok with those jets.Have you any idea what the atomizer and needle are.I have a Casa 210 on a big block with a Dellorto 25mm PHBL carb and that starts from cold with 1 or 2 kicks.Mine has 98 main,47 pilot and 60 choke with an AQ268 atomizer and a D29 needle.Mine runs a Scootopia Ancillotti.It runs through an undrilled airbox with a standard filter.
User avatar
HxPaul
 
Posts: 1583
Joined: Fri May 30, 2014 9:18 am
Location: Halifax

Re: Mugello bad cold starting issue

Postby Rich Oswald » Thu Jan 18, 2018 11:33 am

Plug gap too wide?
User avatar
Rich Oswald
 
Posts: 8746
Joined: Fri May 30, 2014 3:30 pm
Location: Wiseman From The East (East Of The Pennines That Is)

Re: Mugello bad cold starting issue

Postby mr mugello » Thu Jan 18, 2018 12:37 pm

Is the petrol old. Long shot I know, but the unleaded sold nowadays does not store well, causing difficult starting issues.
mr mugello
 
Posts: 113
Joined: Tue Jan 31, 2017 7:07 pm
Location: Great Yarmouth

Re: Mugello bad cold starting issue

Postby Adam_Winstone » Thu Jan 18, 2018 1:56 pm

^... LIKE both of the above.
Adam_Winstone
 
Posts: 1069
Joined: Tue Jun 03, 2014 1:52 pm

Re: Mugello bad cold starting issue

Postby bolzenanker » Thu Jan 18, 2018 2:10 pm

If this isn't a new kit, what was the ring gap like, too big may cause bad starting.
User avatar
bolzenanker
 
Posts: 364
Joined: Mon Jun 02, 2014 10:12 am

Re: Mugello bad cold starting issue

Postby TS1-200 » Sun Jan 21, 2018 2:28 pm

Looks to be sorted, there was a small amount of slack in the choke cable, as mentioned above, although the choke plunger went to the top of the hole, I have adjusted the slack out(well most of it) as I do like to make sure that the plunger seats properly when choke off, wouldn`t have thought it would have made a difference, but it has, thanks for all your suggestions
TS1-200
 
Posts: 123
Joined: Mon Jun 02, 2014 1:06 pm

Re: Mugello bad cold starting issue

Postby mr mugello » Sun Jan 21, 2018 2:39 pm

Glad you got it sorted.
mr mugello
 
Posts: 113
Joined: Tue Jan 31, 2017 7:07 pm
Location: Great Yarmouth


Return to Tuning & Kits

Who is online

Users browsing this forum: No registered users and 5 guests