Norton Commando
Jerrydoe.com  Forum Home  Norton Commando Forum  Photos  [FAQ]  [Search]  [Memberlist]   
 [Profile]  [Check your private messages]  [Register]  [Log in] 
Single Mikuni Conversion?

 
Post new topic   Reply to topic    Norton Commando Forum Index -> Norton Commando Motorcycles.
View previous topic :: View next topic  
Author Message
darkroast1



Joined: 16 Aug 2004
Posts: 10

PostPosted: Thu Aug 26, 2004 7:29 pm    Post subject: Single Mikuni Conversion? Reply with quote

I'm considering converting my '74 to a single mikuni. My motivation to do so stems from the disire for maximum reliablity with out a performance sacrafice. My expectation is easier tuning, starting, similar or greater lower end torque, sacrafice of some top end power.
Any input on whether my expectations will be met?
Any input on bore size? (motor is bone stock)
Any recomendations on kit supplier? I'm considering MAP after reading the thread on someones experience with throttle cable wieght - apparently they include a "special " throttle cable.
In the same light I'm considering a boyer or rita electronic ignition.
My consternation comes from appreciating the stock set up for what it is yet at the same time desiring the best set up. - I suppose I could always put it back to stock though.
Thanks!
Rich
Back to top
illf8ed



Joined: 30 Dec 2003
Posts: 472

PostPosted: Fri Aug 27, 2004 5:04 am    Post subject: Mikuni Reply with quote

Hi Rich,

It sounds like you did a search for "Mikuni" on the forum? There have been several threads talking about Mikuni versus Amal lately. From you expectation you should be able to achieve this with a single Mikuni. Fit and top end performance are the negetives although my experience was twin Mikuni's were very hard to tune properly. Sleeved 932 Amals have served me very well for the passed several years.

Do a search also for Lucas RITA. DynoDave posted a thread several weeks ago indicating this ignition is no longer in production, recommending sources to get the last of the inventory. I went with Dave's opinion that the RITA is superior to Boyer for the combat. With a Boyer I was getting engine pinging. Replacing it with the RITA cured this. I put the Boyer on my '74 JPN and it worked fine. Watch out for the low tension wires coming from the inductor coils..these break inside the insultation due to vibration causing the engine to misfire at midrange.
Back to top
norbsa48503



Joined: 07 Apr 2004
Posts: 995
Location: Flint, Michigan

PostPosted: Fri Aug 27, 2004 5:51 am    Post subject: Reply with quote

Two types of MIC's 34 and 36. 34mm is the best bolt on easy fit. (smaller)Two types Boyer digital and anolog. Anolog bolts right up good for stock engine. Digital (red box) can be ordered with any advance curve you like for an up charge. If you ride side roads with your bike and consider 70MPH speeding than go with the bolt up stuff. If you like working on your bike as much as riding it and like wearing thru rear tires spent another 200.00 and a lot more time just for fun. norbsa
Back to top
dynodave



Joined: 28 May 2003
Posts: 139
Location: USA

PostPosted: Fri Aug 27, 2004 6:08 am    Post subject: Reply with quote

Arrow

Last edited by dynodave on Mon Apr 11, 2005 5:07 pm; edited 1 time in total
Back to top
Jason Curtiss



Joined: 14 Jun 2003
Posts: 661
Location: HOUSTON, TEXAS

PostPosted: Fri Aug 27, 2004 9:34 am    Post subject: Reply with quote

Hi darkroast,

In my mind the "best setup" is one that not only performs the best but LOOKS the best.

The appearance of an AMAL concentric stirs my primal instincts whereas a Mikuni just looks flat and bland like and over-cooked noodle. Moreover, a single Mikuni will not out perform twin AMALs.

However, if you are frustrated with trying to tune your AMALs, then go for the Mikuni setup; many people swear by em!

Regards,

Jason
Back to top
darkroast1



Joined: 16 Aug 2004
Posts: 10

PostPosted: Fri Aug 27, 2004 5:17 pm    Post subject: Reply with quote

Thanks for all of the feed back - I'm still new to the forum but appreciate all the rich content. I'm psyched to be back into the fold of vintage bike ownership!. It so rewarding and challenging at the same time. After riding my 99 honda vtr1000 for five years its a refreshing change to kick a bike and build a relationship that goes beyond just riding, one that brings feelings off the bike as well as on.
Thanks again for the feed back - but I'm still undecided!
Rich
Back to top
debby



Joined: 15 Apr 2004
Posts: 890
Location: Boulder, CO

PostPosted: Sun Aug 29, 2004 9:00 am    Post subject: Reply with quote

I think the Mikuni would be much less troublesome than the amals once you got it set up properly. The people who use the kits from Rocky Point Cycle seem to be quite happy with them.

I still have amals on my bike though. I've had a lot of issues to work through with them but at the moment they seem to be in good shape. Not sure what I'll do when they wear out.

HTH,
Debby
Back to top
geo



Joined: 10 Feb 2004
Posts: 19
Location: New Hampshire, USA

PostPosted: Mon Aug 30, 2004 7:42 am    Post subject: Reply with quote

Made the switch to a 34mm Mikuni this year after 16+ years with the stock Amals. Did the resleeving by AMR quite a few years ago. The Amals ran ok but erratic idling and the ability to stall in traffic convinced me it was time to change. The Mikuni has run great so far. Starts on 1st or 2nd kick and purrs like a kitten...when warm. Cold starts with full choke needs a bit of sorting; my fall project. It's probably a bit slower on top and it seems to run up a bit slower also but I don't ride her fast enough for it to make a big difference. Took my 10 year old son for a 50+ mile ride this weekend. It was great fun cruising the back roads. I'd rather be there than in the garage. Very Happy
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Norton Commando Forum Index -> Norton Commando Motorcycles. All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

The Unapproachable Norton Commando

At the end of 1967 the Norton Commando was announced.

The Norton Commando was greeted with a certain amount of scepticism because on first sight the commando appeared to comprise of the old Norton Dominator twin cylinder engine mounted at an inclined angle in a set of new cylinder parts.

It was not realized that the new Norton Commando Isolastic method of engine suspension damped out all engine vibration and produced a machine which had uncanny smoothness for a vertical twin. In due course the critics were silenced and the Norton Commando had the distinction of being regarded as the first of todays so called superbikes. There can be little doubt that the original design concept of the Norton Commando has proved correct, since comparatively few modifications of any real consequence have been made since production commenced during 1968.

Now nearly 40 years later Norton Commando riders like us are a breed of our own, and as far as we are concerned its still more fun to go for a blat on the old Norton Commando, and fast. As a Norton Commando owner and enthusiast, my goal here is to promote and give credit to those who keep the Norton name going.

It is more deserving to give credit to the Commando itself, for after all these years it continues to be respected. The original Commando designers like John Favill are those who deserve the credit for developing this incredible motorcycle.

The Norton Commando Roadster and Interstate of the late seventies, never died. Although the Norton Villiers factory dispersed the tradition lived on. Today Kenny Dreer in the USA is developing the new 952 CC Norton. What a great looking bike this is, and its engineering is still based on the original layout. It will be interesting to see how the new 952CC Norton does in todays tough motorcycle market. One thing is for sure, I would own one if I could afford it.