martymoose
Hero member
- Location
- Sydney, Australia
Good idea trying the choke
Atlas Questions
- Thread starter Vince
- Start date
You carry on, Vince
. Bollox to the Easily Offended ...And Good Luck with your various trials. I can't help, knowing strictly nuttin about the Atlas. But I'm sure you'll get there.
Andy J
Hero member
- Location
- Isle of Man
The aged and silicone smeared inlet manifolds should have made it to Oz in the tool bag, so if you need some spares Cosi I’m sure Vince will sell them to you..
as for the old exhaust, i had to take a hack saw and grinder to get it off, so I doubt it would be have been much use had I sent it.
chrisk
Hero member
- Location
- Brisbane, Australia
Just cause Cosi called it shit, doesn’t mean anyone should get offended.
Shit load of parts
How much shit is in the tool bag
Is all that shit yours?
Try putting the original shit back on
Like me, Cosi wouldn’t have a clue how much shit came with the bike.
All the mods are bloody expensive upgrades of warn-out failed parts, and all would have an effect on Carboration and require dialling in of the jetting. I got excited with its easy starting and idling only to have it still unrideable. It just hits a wall just off idle, I mean no pull at all. I just had a go at accessing the area where the jets are that requires the carb coming off. I had a text session with the Carb Whisper this morning and that made it clear it's well beyond my fiddling. So I am hoping I can take it to him. Anyway, I am hoping too. I guess I bit at Cossis comment as it's frustrating, 2 weeks here and 2 ks of not-present riding. At least its had an oil change and had Reds brilliant drain plate with a magnetic drain plug added. That's such a great addition to the bike.
Shajota
Hero member
- Location
- Whitsundays Qld
Yeh, I was a bit confused who was offended. Doubt it was Cosi!
Thought going back to step one was a good suggestion until told not possible.
Hopefully you can get it sorted easily Vince - easy start and idling plus initial full revver suggests not too far away (?)
I am hoping it's a blocked main jet, but after hearing about something called emulsion tubes who the hell knows? There are recommended jet changes as well with the carb manifold change. There is also a great technical description on balancing the 2 throats on the Atlas site but it's beyond my pay grade. This carb isn't anything like the bike carbs I am used to.
Cosi
Hero member
- Location
- Kingscliff
Seems there was only one person that got offended with my feeble suggestion to go back to the state we’re it was running prior to dispatch, albeit running a bit SHIT, but nevertheless running…
chrisk
Hero member
- Location
- Brisbane, Australia
2ks in and then turns nasty???
I’d have thought it’d be nasty from the initial go. Jet change may be premature
I’d have thought it’d be nasty from the initial go. Jet change may be premature
martymoose
Hero member
- Location
- Sydney, Australia
And i mentioned emulsion tubes........
Did riding with the choke on make a difference?
Did riding with the choke on make a difference?
KERMIT1200
Hero member
- Location
- Worcester,UK
Vince,
It may be that some of the jets are blocked or !
First check the 'acceleration jet flow ' adjuster (for want of a better description) that sits between the inlet manifolds, just in front of the carb body. The adjuster hangs down like the idle adjuster on a triple. You might find at the moment that has soon as you open the thottle its flooding the engine with petrol and thus bogging it down.
Its been a few years since working on an Atlas so I can not remember which way one should turn the adjuster. Have a play.
Andy
I haven't tried, I pulled the bodywork off to try a look at the carb but chickened out. It's a pretty complex-looking gadget and I know my limitations with complicated. It might be possible to lift the lid to access the bowl and jets but it would be much easier to just pull the carb and if you do that you might as well do it all and I have no clue how to do that. The write-up on balancing on the Atlas site is well above my pay grade. So I spent the day looking for jet suppliers, sadly most are closed for the holiday. I did find a gadget called a jet doctor, it's used in cars and buggies using these Carbs in off-road racing to avoid chronic idle jet blocking.
rodpenroseracing.com.au
Jet Doctor - DRLA Carburetors (fits 36, 40, 45 & 48mm) - Rod Penrose Racing
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Good tip Andy, will add it to the list.
CLEMTOG
Hero member
well what I can tell you Vince is that when I had the bike on loan from a very congenial Andy (the Manx Mog), for about a week, it was hard to start, but start it always did, the idle was much too high, giving about 60k's with the throttle shut in top gear, the idle screw (on the carb) was right out and the quadrant was touching the alloy stop on the carb, and of course there was slack in the cable at this point, a bit embarrassng at red lights or in town, it wasn't my bike so I was not going to fiddle, (I doid however renew the vent pipe from the fuel cap, (MAJOR JOB MAN) but I suspected the carb inlet rubbers, and that was later found to be a correct diagnosis, however, once away from a closed throttle in any gear, it went quite well, I may have even done more miles on it, in that week than Andy did while in his ownership, but there was a bit of sorting to do, e.g. I also noted the front tyre losing air.
I would strongly suggest that all that is required is removal of the carb and through cleaning of all components, it shouldnt harm to run it without an air cleaner for testing purposes, (difficuly to obtain) and there are a lot of components! and on reinstalation balancing of the two choke's
CLEM
I would strongly suggest that all that is required is removal of the carb and through cleaning of all components, it shouldnt harm to run it without an air cleaner for testing purposes, (difficuly to obtain) and there are a lot of components! and on reinstalation balancing of the two choke's
CLEM
I had a small win today, I resurrected THE ORIGINAL HORN. It was buried behind the oil cooler and headlight and was a nightmare to access and was wobbling about on its completely dissolved rubber grommet. I got 1 tiny bleat and then nothing. I bought a cheap replacement, $17 and plugged it in that worked so I soaked the non-working original really high-quality horn in the same fantastic rust-dissolving Cemtools R10 Penetrating oil that freed my seized mirror pivots on my 3c overnight and with the horn button held on and me adjusting the horn screw it finally worked a treat.
martymoose
Hero member
- Location
- Sydney, Australia
Hey mate, if you can get the carby off, and drop over, I can have a go at it. On holidays tomorrow, back to the grind Tuesday.
I expect it will need jets and the only place I have found is in Melbourne and closed till the 11th. Hopefully, Piets mate at OCT will confirm Grants and the CNC inlet blokes' jetting recommendations. Hardly worth pulling the Carb till then, thanks for the offer. I finally got a bolt on the horn today. FUCK ME, everything is hidden behind every other gadget and is fingertips away behind the headlight. I had to move the oil cooler that also couldn't be reached to get a nut on the horn. Got it all bolted up and YEP no horn again. Twigged the adjusting screw and its back. Here is your laugh for the day Marty, you know that missing 6mm flange nut I asked if you had, mid horn job guess what fell out of its hiding place at my feet. Yep, that missing FLANGE NUT, now all I need to do is find out where the 2/ 6mm bolt spacing tubes go in the headlight assemble, they also appeared at my feet mid-job all on their own. It's insanely complicated to assemble with 1 bolt holding Multipla bits at once, so much work to fix a Flippen horn.
BTW I tried every trick I could think of to bolt that horn on including duct-taping the nut into a ratchet ring spanner, I was holding the alan bolt at the time with needle-nosed vice grips as it was close to the steering head. Not enough room for an Alan Key, that failed so eventually I loosened the oil cooler enough to get a 10mm socket on the end of the bolt but that needed 2 extra nuts inside the socket to space the nut close enough to thread the bolt. As I said FUCKEN NUTS TO THAT NUT.