More Power

Johnny R, You are performing a great service for all of us.
Would you define what you mean by street ridding? Do you ride in congested zones with lots of trafic lights, and cops over every hill?
Have you tried any of the "old" technology porting ideas ie. large port entrances tapered and flowed to the valve head with Carbs other than Amal, and if so, what where the results?

You really have peaked my interest to say the least, enough that I might go out to the w'house and break out the old Combat w/ the 36mm Del'orto's on it. By the way, I have a '75 Mk111 w/ 3 miles on it, water never in the battery and I just measured the ports and they are 32mm.

Keep your family out front; I would probably still married if I had learned earlier, " yes dear and no dear".

Well I am heading to Suches Ga. on the 907 for a hour or so road burn, see you later.
Jerry

Hi Jerry, ( Katescottageiom)


Sorry that I haven't responded sooner, Christmas Holidays are a busy time of year. We've been in a cold snap minus 25C and my F-150 truck sprung a coolant leak, so one thing lead to another and know I'm rebuilding the engine , she hasn't got much power so we'll increase it 60 to 80 more pony's. Getting back to your last posting street riding , were i live there are a lot of intersections with cameras and photo radar there's the occasional manned speed trap but the governing municipal body has resorted to remote photo money grabbing, so riding with a heavy throttle can cost money, gone are to old days uncle is watching. PORTING , when it comes to this subject I've gained confidence throught flow testing and dyno work that we are on the ball 8) with cutting edge technology and when a customer takes a product of mine out and gets tickled pink and tells is friends as to the power diffrence from before to after, this makes it all worth it. Old technology is just that, old. Don't read this the wrong way there's always lessons to be learned from what was, but we must push forward. Carbs, I haven't played with Amals at all, we use 35mm Kehin flat slides on Brent Frasers 920 theses make power. I can't help but to lean towards fuel injection there has to be a way to bolt it to a Norton?

Well it's getting late I need my beauty sleep as my wife would say,
talk to ya latter.


Cheers,

Johnny Rocket

Well its + 2C and you can here the water running in the eves troughs . I seen two guy in rain suits riding there Harleys today know thats Canadian and yes this is t-shirt weather for us. We started to tare the 920 Norton apart and found that a spiral lock holding the wrist pin came loose and scored up the cylinder wall, not sure what we are going to do, maybe sleeve it or go for the larger bore size. One thing for sure no more spiral locks ,we've machined up teflon buttons much like automotive drag race engines. Well talk to ya latter.



Johnny Rocket

norton owners are wunderful people

hello all
my name is rob davis from Cincinnati ohio USA.i own a 1966 N15GS750E
scrambler.it has been in my family since it was new.this is from what i know a rarity,part norton part matchless.ive been told i can convert to a electronic ignition instead of the magneto(lucas) which it has now.myadvance plate has been tweeked and needs replaced.any info fromyou norton buffs would be awesome.left brake it,,right shift it :lol: [/b]

Re: norton owners are wunderful people

robd@fuse.net said:

hello all
my name is rob davis from Cincinnati ohio USA.i own a 1966 N15GS750E
scrambler.it has been in my family since it was new.this is from what i know a rarity,part norton part matchless.ive been told i can convert to a electronic ignition instead of the magneto(lucas) which it has now.myadvance plate has been tweeked and needs replaced.any info fromyou norton buffs would be awesome.left brake it,,right shift it :lol: [/b]

Click to expand...

Hello Rob,
Welcome to the forum. It's odd that the G15/N15 is rare in many parts of the country, but here in the Greater Cincinnati area, 2 out of every 3 "Atlases" I have looked at were N15's. I know Bob Schanz sold a lot of them out of Sport Motors in the mid to late 60's.

Your magneto fired N15 can indeed be converted to electronic ignition in a couple ways. If you can find a distributor from a P11, early Fastback, or late Atlas or N15, you can replace the mag and replace the points in the distributor with a Boyer or Rita. This will require mounting coils and rewiring. Kirby Rowbotham in England will machine your magneto to accept the Boyer plate so you can have an original looking magneto. You still need to mount a set of coils.

The problem with both of these options is cost. P11/Fastback distributors are scarce and the drive gear even more so. (The magneto drive will not work). I would suggest trying to repair the mag. There are several places that can re-work and re-build your mag and that would probably be your best option. Doug Wood in Pa. is supposed to be very capable and I'm sure there are others. If it is just the points plate that is screwed up, I'm sure that can be replaced economically.

PM me and I'll see if I can help.

teflon buttons

Johnney R,
While teflon buttons are a great idea for a racing engine as it is torn down fairly often,a road engine is a different matter as you want to get the most value for money (miles) before you have to hand over more money for a rebuild. I tried the teflon buttons in a triumph engine a couple of years ago and after approx 5000 miles i had to remove the top end to fix an oil leak and found the teflon had worn down enough to allow about 1/4" end float on the gudgeon pins, which if it had worn much more would`nt allow enough support in the piston gudgeon boss.I have found if the gudgeon pin is hammering on the retaining clip its more likely to be traced to a misalignment, which was my problem.Could your problem be crank flex?

Shedgnome,

You've answered a question in the back of my head as to the amount of wear in relation to milage. This Norton 920 is more of a test bed for developement of new technology, I must say that the Norton has well placed lines and cures and spending time and money isn't a problem, at this point in life. Kenny Dreer is making a dream come true and I guess I'ed like to add more to the mix. The 920 is still siting waiting for my attention, this spring has been busy to say the least with Automotive projects and I've resently commited to a sponsorship of a 2003 Honda CBR600RR at the local race track , the goal is 130 hp at the dyno, we will see !!! Crank Flex , as soon as possible the Norton 920 will be on the list , Brent is getting edgeee to kick some Harley butt. This will be looked at closely thanks for bringing that up.



Johnny Rocket

8) Exhaust systems

Well it's been intresting to say the least, as to the power output generated by pipe diameter and lengths. Brent Fraser the resident engineer has spear headed the research and designated a bone stock 850 to head the initial first batch of testing, the bike is a numbers matching work of art restord to original specifications and colour, a prime test bed!!
The whole point of the project was and still remains, useable performance in a street environment. We tested a few diffrent arrangements and found that we defiantly can achive changes in any point of the rpm band on the dyno and the rider can with out a doubt feel it on the street, but this has opened up a pandors box of what if's. We had hoped to have some substantial results by now but with diffrent system designs it's going to take time to sort throught it all.


Johnny Rocket

Thanks for the update Johnny, I have been wondering what was going on.
So even a L/C 850 can feel the diff. It just shows you how stretched and tuned these motors are to begin with. Imagine how it affects a highly tuned 750.
I expect the more work you do, the bigger your Pandora's box will get.
Looking forward for the results.
Good Luck!!!!!