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Fe400 Needs choke to start when warm

Alf

Joined Oct 2003
6 Posts | 0+
Reading, UK
Hi, Could somebody please point me in the right direction?

My bike is an 03 FE400 with less than 30hrs use, but has never started easily. I have tried to sort it once and for all by:
- Replacing auto decomp bob weight with 04 updated model.
- Clean up carburettor meticulosly
- New plug
- Check jetting is as recommended by Dave Clark (UK importers).

After doing all of the above the bike will start (eventually) with the choke after a few exhaust farts and idle properly off the chocke after a minute or so. But after it is fully warmed up it still needs the choke to restart.

My current jetting is:
MJ= 185
NJ= DR272
PJ= 35
Needle= K51 one groovr from bottom
Air scrfew: 1.5 turns out.


I have re-checked the carb and every air passage and jet is clean. No air gaps on the rubber boot/intake. Fresh fuel.

Would the fact that it wants choke when warm indicate that my PJ is too lean?

It would be nice to sort this bike's starting before I retire!!! :(
 
Alf said:
Would the fact that it wants choke when warm indicate that my PJ is too lean?

Absolutely. I would go up to the next larger size pilotjet (Delorto also calls it an idle jet). A properly jetted Berg IMHO should start with the choke on and no throttle. Once it begins to warm up the idle speed will slow down. This indicates its time to disengage the choke. Setting the idle speed and fuel screw properly are also crucial for easy kick starting. If the air temperature is over 80 degrees or so the choke should not be necessary.
 
RE: Re: Fe400 Needs choke to start when warm

alf

i had a similar problem but set the fuel screw richer and it was better fr restarting. there are just soooo many things on the old dell orto / SEM ignition bikes that help i can't tell you how many!

my bike starts in the first three kicks so it is possible and even when i fall it doesn't want to stall so there are ways. like i say, loads of things add and add to it getting better. even the gearing fer chrissakes!

regards

Taffy
 
Sounds Soooooo familiar......
When it was new mine started of the button.
Not anymore....
 

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