need a dommi 99 barrel or resleeve

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L.A.kevin

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Mar 11, 2012
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Hi All,

Tearing into my 1960 slimline 99, I've found that the barrel is on a .040" overbore, and one of the spigots is coming loose. It's detached with about .050" gap. I could use a source for sleeving to standard, or could use a new barrel.

Are 99's the same barrel as a 650SS? Anyone know of a source of barrels and/or resleeving services?

Should I stay with spigotted or use rings to cover the spigot slot in the head?

thanks,

Kevin
 
Re; “and one of the spigots is coming loose. It's detached with about .050" gap”
There is a serious danger of the sleeve dropping down in the barrel and seizing the crankcase, don’t ask me how I know :!:
You didn’t state what country you are from despite me looking up your profile, so from the LA in your name I may be mistakenly assuming you are in the USA :?:
This post is from someone in 2006;
“If I lived that side of the pond I would contact the Los Angeles Sleeve Co . They used to and probably still do make 3 different sleeves for 99/650 barrels, 1/16, 3/32, and 1/8 inch wall thickness. Suggest they would advise on selection. 25 odd years ago it was cheaper to UPS 2 day service liners in from them than it was to have them made in the UK by Hepolite.!!!!!
A friend still gets his from them.
IF going down the resleeve route I personally would find out if they will do the COMPLETE job because I suspect they at least will do the job CORRECTLY.
Their telephone number is (562) 945 7578.”
HTH
 
You are correct regarding my location, and I wanted to independent confirmation of LA Sleeve as a good source. Thanks for the confirmation. I will take the day off work next Monday and visit in person.

My barrel has a very strange failure in that the spigot is coming loose. It is obviously a separate piece from the bottom of the barrel. The barrel is on a .040" oversized bore and is not sleeved in its existing condition.

Thanks again,

Kevin
 
New or resleeved 99 and 650 barrels have been unavailiable for years, you are likely to have more luck in the USA than the UK. If you are prepared to wait ,there are plans to cast new ones. Otherwise you will have to get your cylinders re-sleeved yourself. Some are happy with their re-sleeved ones, I would not be. Seen barrels where liners broke through to the outside ,usual for the base flange to be extra weak after liners fitted. They were not especially strong when new and on std bore. 650 and 99 barrels have been interchanged although there are small diferences.If my 99 barrels go I would be looking for a 750 motor as a replacement ,at least spares are there.
 
There are two styles of barrels fitted to Domi 99 models. Dimensionally they are the same. The later type is the same external shape as the 650 barrel with a vee shaped cut out at the front of the fins, but without the liner slots to clear con rods. The earlier shape of 99 barrel has a large radius at the front of the fin area like the 500 type.
I spoke to Andover Norton a few months ago & they were working on new cast iron barrels for 600/650 bikes. HTH.

Martyn.
 
I think there are at least 3 types if you count the Dynamo barrels with the extra mount. Plus some with no spigot at the top.
 
L.A.kevin said:
You are correct regarding my location, and I wanted to independent confirmation of LA Sleeve as a good source. Thanks for the confirmation. I will take the day off work next Monday and visit in person.
My barrel has a very strange failure in that the spigot is coming loose. It is obviously a separate piece from the bottom of the barrel.
Click to expand...

No, the liner is all one piece, spigot or no spigot. There were adverts on flea bay about six months ago on spun cast liners on the various Dommis , can’t locate them now.
 
Bernhard said:
L.A.kevin said:
You are correct regarding my location, and I wanted to independent confirmation of LA Sleeve as a good source. Thanks for the confirmation. I will take the day off work next Monday and visit in person.
My barrel has a very strange failure in that the spigot is coming loose. It is obviously a separate piece from the bottom of the barrel.
Click to expand...

No, the liner is all one piece, spigot or no spigot. There were adverts on flea bay about six months ago on spun cast liners on the various Dommis , can’t locate them now.
Click to expand...

Bernhard, just to clarify, my current barrels with no sleeve have a separate spigot that has come loose on the left side. The spigot is a ring that was installed in the barrel on both sides. The one on the left parted company with the barrel.This may or may have not contributed to my holing a piston. Of course I'm not going to ask LA sleeve to reproduce this when they sleeve my cylinders.
 
I have never heard of or seen spigot inserts being fitted to a barrel, sounds like a one off after someone found they were unhappy with the lack of spigots , the usual thing to do in this case is to fit rings into the head recesses, not ideal and have been known to move and destroy pistons.Its possible that these are NOT 99 barrels but 650 items which were made by AMC who in their "wisdom" decided that spigots were not needed . Its also possible that the last 99's to be made were fitted with 650 barrels as they are similar but not exactly the same. When production shifted to AMC at Woolwich 1963? ish they had lots of production problems and had to scrap loads of parts they could not finish to acceptable standard. Another possibility is that they ARE 99 barrels and someone broke the spigots in clumsy working and tried to replace them.Not sure where you go from here!!.
 
norton bob said:
I have never heard of or seen spigot inserts being fitted to a barrel, sounds like a one off after someone found they were unhappy with the lack of spigots , the usual thing to do in this case is to fit rings into the head recesses, not ideal and have been known to move and destroy pistons.Its possible that these are NOT 99 barrels but 650 items which were made by AMC who in their "wisdom" decided that spigots were not needed . Its also possible that the last 99's to be made were fitted with 650 barrels as they are similar but not exactly the same. When production shifted to AMC at Woolwich 1963? ish they had lots of production problems and had to scrap loads of parts they could not finish to acceptable standard. Another possibility is that they ARE 99 barrels and someone broke the spigots in clumsy working and tried to replace them.Not sure where you go from here!!.
Click to expand...

Thanks for the info, Bob. For lack of a better plan, I'm going to go with liners with a spigot, like what several vendors are doing. That will prevent the spigot from parting company at least. I guess the only other options with liners is to instruct LA Sleeve to do liners that eliminate the spigot. Then, I'd have to install rings in the head anyhow. I think since I have to get something in the head to preserve compression and head sealing, might as well have the spigot as part of the liner.

Wish me luck!
 
I have heard of owners ignoring the recess in the head which will eventually fill with carbon. With the lower octane fuel often used a small drop in CR is no bad thing and with mild classic use dictated by the old conrods the lower level of tune often makes for a more pleasant engine.
 
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