Unofficial Royal Enfield Community Forum

Royal Enfield Motorcycles => Bullet Iron Barrel => Topic started by: Seipgam on October 01, 2018, 04:16:50 am

Title: Basic Setup
Post by: Seipgam on October 01, 2018, 04:16:50 am

Hi Guys,
Just a couple of questions on setup of a 1995 Bullet 500, the bike is new to me.
The carb has standard jets at 110 and 25, but not sure if the needle is standard - has 40H7 (or maybe 4DH7) on it and is set at the bottom groove (highest needle setting). Is this the correct needle and a standard setting or starting point?
If it makes any difference the bike lives at 350m above sea level and will mainly be ridden in the warmer months - 18c to 35c.

Also the bike has a Boyer ignition fitted and is running an NGK BKR6EKPB 11 Platinum plug, does anyone know if this is right when running a Boyer or should I run the standard NGK BR8ES ?

Thanks in advance, Geoff.

Title: Re: Basic Setup
Post by: ace.cafe on October 01, 2018, 07:20:54 pm

B8ES.

We need to know what muffler and what air filter you have, in order to make accurate jetting advice.

Assuming you have 28mm Mikarb.
110 is way too lean for a main jet at your elevation. 25 might be okay for a pilot jet if you have a stock exhaust and filter. We need a bit more info.

Title: Re: Basic Setup
Post by: mrunderhill1975a on October 01, 2018, 09:37:50 pm

Ace knows his stuff.  I am at 5,290 ft and with the 110 main and 25 pilot jets, my ride would only idle and bog down at 1/4 throttle.

Title: Re: Basic Setup
Post by: Seipgam on October 02, 2018, 01:32:15 pm

Yes guys, standard micarb, exhaust and air filter.

So a B8ES with a Boyer?  The platinum plug unnecessary?   I got the BR8ES recommendation from Pete Snidal's manual.

The bike is not on the road yet, a few jobs to do before registration.  Just looking for a good starting point.

Thanks again, Geoff.

Title: Re: Basic Setup
Post by: Adrian II on October 02, 2018, 02:35:10 pm

B8ES for suppressor plug caps, BR8ES for non-suppressor caps, though Champion N4C or RN4C might be better. Some modern electronics are sensitive to ignitions with no suppression at all.

A.

Title: Re: Basic Setup
Post by: blasphemous on October 07, 2018, 06:02:32 pm

4DH7 is the stock needle that comes with the MiCarb.