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Messages - ManicGTI
1
« on: April 08, 2019, 05:53:45 PM »
Hello again! I'm sad to say that shortly after my last post above, the bike hasn't been touched - life caught up with me in the form of having a nipper and house refurb works. Hopefully @Laverda120 has had more luck than me! Apologies to resurrect this thread, but I figured it shows the history of what i've been up to so far with this bike. This weekend I had a rare moment to have a play with it again, so I thought i'd look at some of the minor issues that I had never got resolved before, so I now have throttle and clutch cables hooked up, and all the lights are working again  I've fitted the hondaman Ignition unit and a new battery, it's now sat on the optimate so at least I know it'll have juice when I go out to play with it. So, with 2 year old fuel (with some fuel keeper additive) and a bit of luck...it actually did fire up first time since my post above! Plugs 1 and 4 have sooted up immediately so assume these are rich, but 2 and 3 lare minty clean...bugger. Looks like I have spark on all plugs so I've pulled the tanks on all the carbs again, given all the jets etc a good blow through with carb cleaner. Hopefully that will help things after it's been standing. I'm doing all this with the airbox out, tried to refit but my rubbers are knackered. Am going to try the 'wintergreen' method to soften them up as DavidSilver doesn't seem to have them in stock at the moment.  Dave
2
« on: December 09, 2016, 08:33:30 AM »
Sounds like progress anyway! Are the carbtunes worth getting? Do they come with the adaptors to screw into the balancing ports? I'd like to have a bash at balancing mine further now.
My new brother in law popped round a few days ago, turns out his first bike was a 400. Happily mine started on demand with no air box/filter on and he seemed to think it was running OK. I have to admit being used to more modern bikes sometimes I don't know if something sounds rough, or it's just the age of it.
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3
« on: November 17, 2016, 04:23:09 PM »
I've used their Rings and Carb Rebuild kit, but i'm not a great reference as the bike isn't on the road yet!
4
« on: November 13, 2016, 04:49:00 PM »
All 4 carbs are filling, so yeah I'm assuming I've got a dodgy connection somewhere on that coil
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5
« on: November 13, 2016, 11:02:49 AM »
There's a mk1 lives near me, they look modern even now and very crisp design. We ran an 86yr Audi 5 cylinder some time ago a close relative in engine and fuel injection.
I don't think there's any mysteries in the bike carbs, just a bit of time and careful setup and they're not much trouble when up and running. You can't be far from getting them sorted I think.
Indeed, even the later engines weren't too far removed, I fitted the 2.0 16V from a mid 90s Corrado, running a mix of 16v mk2 Golf and 8v Mk1 k-jet systems. So carbs are back on and bike is started, but appears to be running on only cylinder 1&4 now. Idle with choke on is laboured (Unsurprisingly). Must have knocked something as all Four were firing beforehand. I have a feeling I'm going to be chasing my tale a little on this beasty before I get anywhere close to setting it up properly. In the mean time I'm going to set up the brakes so at least I can run it up the road at some point! Sent from my ONEPLUS A3003 using Tapatalk
6
« on: November 10, 2016, 03:42:40 PM »
Ah cool, thanks. Yes indeed, I've had a couple of '83 GTIs on K-Jet.
It feels like I've progressed anyway! Hopefully i'll get to refit at the weekend and try again...
7
« on: November 09, 2016, 08:19:25 PM »
This was pissing me off so I made haste home on the Street and got cracking. Backing all the adjusters off did bring the throttle Mech back round to about 2mm from the idle screw. Much better! I've now synced them with a 1.5mm drill bit.
Thanks for that tip Peter, I'll take a look at the Mech position.
I was up near Dalston on the same road as Tom, but now in New Malden.
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8
« on: November 09, 2016, 12:37:41 PM »
Stealing a pic from ebay for reference, i'm confident that I assembled the adjusters correctly (although I could be proven wrong!):  So if I back all the adjusters out, the throttle will be returned towards the idle adjustment screw, and the slides towards closed? I'll give it a poke tonight.
9
« on: November 09, 2016, 10:03:15 AM »
It's exactly what a float chamber is for, to break the head pressure ( no sniggering at the back there, oddjob and Julie) and provide a reasonably constant fuel weight for the carb's vacuum to work on, which in turn gives you a chance of linear jetting response.
If it didn't do this then as the fuel tank volume varied then so would the jetting and the float height would be absolutely meaningless.
Thanks for the clarification, I have to admit I'm new to Carbs and this era of vehicles. I'm used to working on Mk1 Golfs and MX5s! Take a few photos, we may be able to spot the problem.
Thanks, I'll try and take some clearer images of the set up as it stands as soon as I can.
10
« on: November 09, 2016, 09:57:00 AM »
So, 5 minutes after posting my 10PM message last night I took a long swig from the beer bottle sat on my workbench. It was a big mouthful. Sadly however, it turned out that the cool, refreshing (and undrunk!) Hop House 13 was in fact at the other end of the bench. The bottle I had taken a swig from contained the petrol I had drained from the carb bowls. Yuck. Luckily I don't 'think' I actually swallowed any, but I've gone through many litres of water to dilute and flush it through. I can still taste petrol now. At that point, my interest in continuing to work in the cold diminished rapidly. So the only picture I have is this one:  If the tickover screw when screwed all the way in still has a gap to the lever it adjustes you definately have the slides not right
The lever does touch the idle screw when fully screwed in, but only just. This is with the slides all bottomed out (ie the individual slide adjusters all screwed in as far as they will go), there's about 6mm gap.
11
« on: November 09, 2016, 06:45:27 AM »
I believe we are taking about the same screw, yeah the casting is to far away from the tip of the idle screw.
I had the carbs completely in pieces, only the chokes were left on. Idle screws all completely removed, so yes it does look like I may have assembly incorrectly. Bugger. I'm not sure what could even be wrong!
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12
« on: November 08, 2016, 10:00:27 PM »
With a bench sync it is easy to get the slides so they dont close
first back off the idle screw till it falls out, then un adjust the carb slide adjusters so all slides hit the bottom pick one(on the 550 k3 its easy as one has no adjuster) and adjust the slide adjuster till it nearly moves, refit the idle screw and adjust it till the one you picked lets your prefered drill bit fit, 3mm is too big you need 1.5 if poss, then adjust all the others to the same. Finally undo the idle screw again and make sure all slides hit the bottom.
Run engine till hot ad ajust with gaudes AFTER you haveset tappets, cam chain and ignition timing
Ok, I just tried it this method and hit on an isssue straight away. Essentially the idle screw bottoms out just at it touches the casting, so i'm getting nothing out of the idle screw. Hmm, an adjustment i've missed?
13
« on: November 08, 2016, 04:33:04 PM »
Carbs are like life, you can't get enough head
Hey, it's cold and lonely out there in the garage. I'll take what I can get.
14
« on: November 08, 2016, 12:01:47 PM »
Thought i'd drop this simple little Carb Float explanation here for prosperity, although it's light on actual technical explanation: https://www.fix.com/blog/motorcycle-carburetor-float-height-adjustment/. I've had another thought regarding my richness. At the moment I have the Fuel tank sat off to one side on top of my garage shelf's, (ie >1m higher than the bike itself), running a temp long fuel hose down to the carbs so I can work on it with the tank off. Would the additional head from this setup cause me issues? All being well I should get a chance to pull the carbs and reBench Sync / Float Check tonight 
15
« on: November 03, 2016, 12:50:58 PM »
I'll wait until it's running 'well' before feeling in any way smug, lol
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