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*PS* Chris, No I haven't replaced the O-rings on the idle mixture screws, but when the carbs have been apart these (and other accessible O-rings e.g. on fuel filter dome) have been carefully inspected with a big magnifying glass, and seem to be perfect. Yes I agree, the next bigger pilot...

Hey, thanks for the fast replies. Chris ... I spent a few hours today getting the carbs out again, partially disassembling them, packed as much thick grease as I could around all 4 butterfly shaft exits, and put everything back together carefully. Interestingly, this does seem to have made...

Hi Chris, or anyone... I've had almost a year off the XS400. I bought an XS650 and have had a lot of fun riding that! But now want to finish the 400, which is cosmetically finished already. OK to recap. So my iffy starting problem on the 400 has seemed to come and go a few times but has...

Hi XSChris, Thanks for the tip and No, I didn't... are those seals available as separate parts or have I possibly knackered my carbs? I assume you meant 'butterfly valve seals' BTW? I measured the coils themselves and both primary resistances were in spec. The battery voltage (at the...

Hi all, As some may know from other threads, last year I got a 1980 XS400 US Custom (UK model, like Special). This has points ignition on SOHC engine. It has always been hard to start, and iffy idling. It will often die at the lights ...embarrassing! After doing all the obvious...

eBay number: 161103038790 Price seems OK... Oh yeah it's a 650 though! ;o) Too far away for me, unfortunately.

"On an intellectual level, at least, I have always known that more good came out of England than just the road to Scotland." :yikes: :laugh:

Macho black look, a bit aggressive, down-to-earth... I like it! :thumbsup:

Hi Lou, Well we have freecycle, gumtree etc. Its no only the scots who are thrifty you know, in fact after both major Scottish banks have gone tits up that stereotype's rather gone for a Burton! Ordered a new Caburg lid yesterday. Local scooter shop very helpful, took all the time in the...

Hey guys thanks fr the tips! :thumbsup: Will roll down to local Aldi, got good cheap stuff there before. And check out ghostbikes as well. There is a bike training place round the corner from where we live, I think some of the guys there are genuinely experienced bikers (.. although the...

OK having more or less got my bike sorted I'm hoping to be back on the road imminently! Today girlfriend & I went to local Yamaha dealer in Worthing to see about lids for 2 and a jacket for her (she doesn't want to wear leathers if at all possible). I was already lucky finding a really heavy...

Regarding the butterfly assembly question when boiling carbs. I noticed there is a plastic part, looks like a sleeve, in the throttle / butterfly assembly on my carbs. Reading older posts, it seems like many people have disassembled the tops and float bowls, removed all the small innards and...

Waaaaaaahey! My bike starts fine now!:thumbsup: :D That should be the end of this thread, except maybe I will post back details of any jetting changes, if they seem to be necessary once the bike has been run properly. Went out this morning and tried starting without touching the throttle at...

Hi Scorpio, Thanks for the input. Have not changed anything from stock, as yet: The air filter & air box are 100% stock. OK, I have replaced the Yam exhaust with the straight-through Norton peashooters. HOWEVER the peashooters are packed out with lots of fine wire wool followed by...

*PS* as mentioned on another thread, I did a slightly longer test ride this time... once running, power is amazing. Virtually wheelies in second gear, screams up to the red line in 2, 3, 4 gear in what seems like very little time and with no noticeable flat spots. There really does not seem to...

-UPDATE- Last weekend I did what I thought was a very thorough carb clean, it took 5 to 6 hours all told... and I'm still having the same problem! No real change at all. AAARRGGGHH!:banghead: After this experience plus more VERY extensive reading in the forums, there are a few things I...

Hi nitrofish, I have a similar problem on my bike. All I can tell you is I have done Points gap Static timing Valve clearances Check battery and voltage at points New condenser Very Thorough carb clean (boil, careful probes with brass wire, then carb cleaner shoot through) New inlet stubs New...

I tried a brand new condenser, it didn't make any difference ... this seems to be a common experience! Anyway it was cheap & I guess the spare might come in useful one day. :banghead:

Hi Tobie, OK thanks for the input, that does make it clearer. :) I know a lot of things could have been inferred from other previous posts, but I wanted to be as informed as possible before attempting the work and be as clear as possible on the issues. Will take it outdoors on gas burner...

Hi, I need to do this on my 1981 XS400SE (UK - like a Special) SOHC (4G5). Seems like we didn't quite pin down the best way yet... unless anyone posts better advice, I'm going to try undiluted white (distilled) vinegar, and heat but probably not to boiling, as don't want to totally fill the...