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Discussion in 'Airheads' started by planktonnn, Aug 25, 2009.
7.5 out of 10
The DMW has an appointment with Doctor Dave in the morning, that's if I can get it started to get it there...
does the WOOW mean the beasts now a runner come on now spit it out
Hopefully he's gone for a ride to celebrate.
Give me a chance to get it typed up dear fellows
By Rodney Aguiar...
<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <woNotOptimizeForBrowser/> </w:WordDocument> </xml><![endif]--> So, WOW!?! - I had the misbehaving DMW booked in for 9AM, so I began trying to start it at around 8AM just to be sure, you know? In addition to giving me plenty of time so as to reduce the likelihood of Grrrrrrr Arggghhh Smashness, this was also with the aim of getting there early & giving it a chance to cool down because the symptoms were, as Ive mentioned, worst at a cold start. Even after a night of trickle charging it was, as usual, resistant to starting but with a bit of prodding & kicking & tweaking of settings it eventually kicked into cackling life and I rode direct to Doctor Daves, getting there before the gate was even open. He was a bit surprised to see me, because, as you long term browsers will know I have always been something of a night bird and have only recently discovered theres a 9 in the morning too. Boom tish. Iiiiiii thannnkew, Im here all week
I was, as is often the case, to be looked after by Magic Ian, and he knew just how to start naturally by putting the kettle on. I let him settle in before beginning to feed him the symptoms & other info and, after the obvious carb discussion, the first thing he asked about was valve timing. In the spirit of letting it cool down we supped at our cuppas and shot the breeze a short while, then we knuckled down. Well, he knuckled down & after taking the tank off as requested I commenced wandering around the workshop apologising for my mechanical ineptitude while he dived into checking compression & the coils & HT leads/caps & pulling the plugs etc.
The right side wasnt giving ultra brilliant compression, and the left was lower still so it was off with the rocker covers & front cover and prodding at the clearances before cranking it via the rotor bolt & checking them all proper like. FYI its a post 82 engine, assembled from a seemingly good condition late type short engine (£11 via Jake on ebay), Nikasil barrels & heads from another engine, with new rings @ the rebuild some 25k miles ago, so at least from a wear point of view one ought to expect reasonable compression, were all else set well & seated firmly. I could have checked the clearances myself, but given the same scarcity of tools & no adequate workspace as when Id last set the clearances (in the rain in the car park here at The Place) I just wasnt going to get it done & certainly not properly. Given the aforementioned working conditions when last I set the clearances there was most certainly the potential for me to have got them wrong. Also, see above & generally thru/oughout this entire thread for ample proof of regarding my mechanical ineptitude. So I didnt think Id set them myself. I thought Id let Magic Ian do it.
The right side was broadly right & required only minimal tweaking to the preferred settings of Magic Ian*, and the inlet on the left was within spec, but the exhaust on that side was tight. Its quite likely that I was being rained on while setting this one or may have lost my way in that part of the process or just plain got it wrong so I may indeed have thereby been contributory to the overall not working nuisance Ive been living with for the last few weeks, in the sense that while the engine could get away with the tight setting when all else was well and good, once the carbs & general other settings/electrics of the bike weathered with usage the clearance problem worked together with general wearing out/other things I got wrong to make up the overall problem, if you see what I mean. Im not proof reading this shit so if none of that makes sense youll have to work out what I mean, where I was wrong and what was right, write it down & send it back to me in triplicate. Thank you.
There is of course the potential for a variety of issues, should the clearances wander out again, which we chit chatted as variant possibilities while Ian carried on checking this and adjusting that, but once hed tweaked the rocker block bolts down on the left head** and got the valve timing where he wanted it there was better compression, equal to the right, and so we moved on with the process.
* Somewhere in the middle of the book variance.
** I thought Id got them torqued all happy and such, but he was able to pinch them down by a little. The right side was ok.
I've no doubt the more mechanically adept amongst you can see that this exhaust rocker is running a little tight...
We (he) moved on to carb cleaning by applying carb cleaners & an airline to the idle circuit to clear the tiny galleries etc. Looking at the right carb he saw that the slider was slightly misaligned in its bore, and so he began to investigate the diaphragm. I had put new ones in at the rebuild and true to my mechanismical mangle-handedness it seems I’d failed to get the bottom tab that fits into the slider seated properly. The tab into the carb body was right but the diaphragm had been attached to the carb incorrectly and this, over time, led to distortion and subsequent slight mis-seating of the slider. It was possible to see that the diaphragm had become slightly swollen as a result of the twisting/twirling forces therefore applied to it and had stretched a little to find its own level as it were. This again reinforces the benefit of knowing what you’re looking at. So, Ian took a new diaphragm package from the nail it was hooked onto above him & reassembled the carb. I had pointed out that I thought the mixture screw on the right carb was missing its retaining spring and that the O ring was suspect. He confirmed this & hooked a mixture screw/spring/O ring from a Bing laying on one of the shelves, then we (he) were ready to refit the carbs & see where we were*
On inspecting the two side studs on each of the rocker covers he indicated the tired/partially chewed threads thereon, and cut replacements from a threaded rod, cleaned up the ends with a swift slide past the bench grinder & refitted the rocker covers. He cleaned up the spark plugs, got the whole thing back together, dropped the bench and I refitted the tank… Ian cured an overflow from the right carb bowl and I held my breath as he reached for the starter button. The bloody thing started first time and Ian moved on to balancing the carbs, that dark intuitive art about which, sadly, I am no more knowledgeable than I was last week. I could hear the differences his adjustments were making but to be frank he was a blur of tweaking & fiddling and I couldn’t steal his skills. Not even a bit. He got it roughly sorted & switched it off to give it a little chance to cool down.
I’d been meaning to change one of the rocker cover gaskets for some time as the one in place had a couple of tears in it, but I had avoided getting to it as it was only misting a little. It now became clear that the gasket had give up the ghost so he went hunting for a new one as the left rocker joint was leaking. He cleaned the faces and got the new one secure with the help of a little snot. The time had come to fine tune the carb balance…
* I was crouched down by the heater.
Is that a tax disc holder with an in date tax disc in it???
Well well well isn't that a novel idea. Actually displaying a tax disc on your bike
My pin board in the kitchen is getting rather full of tax discs
Well, barely in date, but yes. I find that PC Gonemad is already happy enough to pick on whatever he can if & when he stops me thinking I'm one of those twats that ride around Walton Court on scrap bikes* so I prefer not to give him the option of writing me a £30 'Failure to display road fund license' ticket when he pulls me over to erroneously examine my exhaust for E marks or measure my plate incorrectly on purpose etc.
Of course I can't have tax disks on a pinboard in the kitchen because 1) - It wouldn't go with the wallpaper, and B) - PC Gonemad may consider my number plate to be 1mm under size like he did last time and give me the line that 'It doesn't show up on my ANPR screen & I can't see a disk so I'm taxing you by fixed penalty ticket without a court hearing or evidence just to piss you off because I am Judge Dredd'**, and then try & call out their £266 a time recovery contractor to cart the bike off for an inspection like he did the time before last.
I'm only glad that I've not come across PC Gonemad when he's had a 'Police:STOP' camera team with him like that poor sap who's on repeat on cable getting stopped round the corner from your place with excessive amounts of Viagra & Nunchucks all stuffed down his trousers. How is Dermot these days? Now, would I be right in imagining that there's a date set for Shiny Knobs Night at the Fuckingemshite Shiny Kwaka Z1 Club? 19th June?
I jest, it is of course a lovely gathering of varied & beautiful machinery & not a few strange bolt jockeys - held in a lovely pub where the Prime Minister likes to leave his daughter - and the bike annual event is an evening which never fails to give a pleasant evening of browsing the wide array of bikes that attend and provides a fine opportunity to Yank a few chains I will not try, for a third time, to get a Rat/Scrap cup initiated. Instead I will again just park in the middle of a line of identical BSAs or RD400s or by a G50 Race Special & let my rust infect them
Other pics @ http://www.bbcmcc.freeuk.com/Events.htm
Of course, I think I speak for a good sized bunch of us all when I say that I wouldn't mind paying road tax if it was spent filling in some of those holes up there on the roundabout by you with something that lasted more than 3 days... Each reader please insert your own version of an 'All Administrative Government & Justice Doesn't Work' based rant & each fill in your own specific examples & reasons as to 'How & Why It Is All Shit'.
The road surface of the Roundabout just up the road from the DBD abode...
* I am, of course, a twat. Just not that specific variety.
** They nearly are http://www.dailymail.co.uk/news/art...tice-hundreds-lawyers-QC-urge-Government.html
Re ** I refer the reader to http://www.advrider.com/forums/showpost.php?p=20837257&postcount=3779
Without blowing the end of this predicatable tale, I think I can confidently assume that the aforementioned reluctance with starting, which is almost entirely gone but-still-a-bit-there, is now to be considered as electrical. Not least because now that the thing is mechanically more cooperative the problem responds to a dousing of water repellent WD40 & the like...
I feel perhaps the real test is: Were they ordered to, would they point their guns at us? I fear the answer is yes.
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