Diagnosis and suggestions please.

Message

DavShill · #16 Post by **DavShill** » Sun Sep 09, 2012 7:20 pm

Thanks Keith- Mine doesn't have an immobiliser.... are you refering to the tip over switch/sensor that cuts the engione when the bike falls over?

Aladinsaneuk · #17 Post by **Aladinsaneuk** » Sun Sep 09, 2012 7:28 pm

Spoke with earlier, and my first instinct was alarm / immobiliser but i would hazard a guess that you also have a frayed wire...

DavShill · #18 Post by **DavShill** » Sun Sep 09, 2012 7:30 pm

Yes I'm thinking the same Pete - will disappear into the garage tomorrow evening for a good look.

Aladinsaneuk · #19 Post by **Aladinsaneuk** » Sun Sep 09, 2012 7:33 pm

and sorry that it was not straight forward

If you do find it - please photograph it - I think it is about time we dealt with this in the technical section

old git · #20 Post by **old git** » Sun Sep 09, 2012 7:42 pm

DavShill wrote:Thanks Keith- Mine doesn't have an immobiliser.... are you refering to the tip over switch/sensor that cuts the engione when the bike falls over?

No when I had the problem tested tip over switch as well, not the problem.

When I bought the bike it had a alarm/imobaliser installed, (datatool I think) prev. owner had killed off the alarm part, but left all the wiring taped-up & under the back hump, imobaliser part was still working.
when I had the problem I stripped out the whole thing, so now nothing in there, not had any further probs, but as I said maybe it was the ht/spark plug leads that I replaced, the two jobs were done at the same time & I have had no further probs.
check the tightness of your spark plug caps, one of mine was very loose fitting.

MartDude · #21 Post by **MartDude** » Sun Sep 09, 2012 7:51 pm

HisNibbs wrote:Fingers crossed...

I stripped the rear cowel off but nothing looked suspiciouse so I had the tank up and air box off to follow up on Panda's lead. Even knowing the problem might be there it was hard to spot. Digging in there pretty deep there was one small rather dirty grey wire that looked a bit flat and was rough to touch... then the glint of copper.

Been on a test ride and it's looking good.

Thanks all, thanks Ridersite and special huggs to Panda, I might never have found that without your input.

I like stories with with happy endings.

Panda · #22 Post by **Panda** » Sun Sep 09, 2012 8:43 pm

Here's hoping that sorts it for you HisNibbs..... Like DavShill my biking just for plaesure these days and after 5 very happy years with my Falco I was beginning to despair that fault wouldn't be found. I'd even started contemplating a replacement. But all well now and just back home from a 350 mile day up to the Highlands - and no rain!!!!

DavShill · #23 Post by **DavShill** » Mon Sep 10, 2012 11:27 am

Ok just checked the plugs and leads and the two plug caps on the front pot are loose (rear cyclender they are very tight and snug). So I will replace the caps. Two questions:

Is there an off the shelf replacement at halfords (part numbers please)

and.... would this really cause the problems I've described or would it just run rough on the one good pot?

HisNibbs · #24 Post by **HisNibbs** » Mon Sep 10, 2012 11:45 am

The problematic wire was attached to a smallish grey two wire connector block that is left hand side behind the fuel line union. The wires are unsheathed and rub on the rear cylinder head. The actual wear was very hard to spot and it was only by sliding my fingers along them that I picked up something was wrong.

Loose caps are IMHO an unlikely culprit as the HT will jump quite a gap and you'd need all four to be problematic to stop both cylinders.

DavShill · #25 Post by **DavShill** » Mon Sep 10, 2012 11:55 am

Yes - my logic makes me think that too Keith.

D-Rider · #26 Post by **D-Rider** » Mon Sep 10, 2012 12:27 pm

Another "wear point" is where some of the loom passes the steering head and the wires are continually moved and rub on things. A while back while I was tinkering (probably when I swapped the forks) I spotted damage to wiring there but re-insulated it before it caused any problems

DavShill · #27 Post by **DavShill** » Sat Sep 15, 2012 5:17 pm

Had the panels off and the tank and airbox and the rear tail section all off. Been all over, in and under hunting for frayed or rubbed wires and can find nothing. Checked battery terminals, sidestand, tip over, kill switches. Re-assembled and rode 60 miles this morning - traffic pootling, steady 50 - 60 mph, ragged it up to 135mph (on a private airfield....) and she didn't miss a beat.

There was a slight hesitation occassionally when just opening the throttle slightly but nothing much.

So I'm still no wiser

- will have to see how she goes.

How's yours going Keith?

fatboy · #28 Post by **fatboy** » Sat Sep 15, 2012 7:24 pm

Had a similar problem, instant cut out, no fuel supply, fault would rectify itself when it got round to it. Did a resistance check on all fuel supply wiring,found power to relay, no power out,replace relay...problem now seems to be at fuel pump so replace wiring from loom to pump....same problem, thats when I admitted defeat.
My mate traced it to being a broken earth on the fuel supply line, new remote earth to fuel pump.. job done

Jolly good of your local airfield to allow you to do test and evaluation work on their strip, chocks away

DavShill · #29 Post by **DavShill** » Sun Sep 16, 2012 8:43 am

Thanks fatboy - can you describe the location of the bad earth - presumably it related to the assembly that is attached to the underside of the tank.

Airfields very friendly round here, just need to see the squadron leader

HisNibbs · #30 Post by **HisNibbs** » Sun Sep 16, 2012 6:55 pm

Certainly the cut out problem is fixed. In all the digging I've done I may have upset something else as there is now a slight transition point comming off idle. It seems to just be pulling on one but it does pull quickly through it. A tadge like Pete's but smoother just not as good as it was. New plugs not yet fitted and maybe TBs need syncing.