Author Topic: Question about '87 GSXR . (Read 6338 times)

bigpants · « **on:** October 28, 2017, 02:37:00 AM »

Hi everyone. Is it ok to post here about a non - guzzi bike ? I thought I should ask as I recently posted a pic of my guzzi on a suzuki forum and got deleted ! Jealousy I reckon.

Mr Pootle · « **Reply #1 on:** October 28, 2017, 04:20:09 AM »

Look back through the posts. There are great pictures of bikes of every age and make. Obviously MG riders aren’t as insecure as some others.

KiwiKev · « **Reply #2 on:** October 28, 2017, 04:33:55 AM »

Yeh go for it as long as it’s not a Harley lol

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Huzo · « **Reply #3 on:** October 28, 2017, 04:42:23 AM »

I like it when guys post pics about bikes that are different from mine.
It makes me realise how lucky I am !

wavedog · « **Reply #4 on:** October 28, 2017, 05:17:19 AM »

radguzzi · « **Reply #5 on:** October 28, 2017, 07:35:30 AM »

Quote from: KiwiKev on October 28, 2017, 04:33:55 AM

Yeh go for it as long as itï¿½s not a Harley lol

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Yeah, that would be in bad taste...

guzzisteve · « **Reply #6 on:** October 28, 2017, 07:40:14 AM »

I had a Suzuki once, 72 Purple Water Buffalo, crashed & burned and I wasn't riding it. Bought it in 74 for $1200. Sorry no pics.

img url

RevTech is not a HD

sdcr · « **Reply #7 on:** October 28, 2017, 07:55:58 AM »

Especially, no BMW's...

Chuck in Indiana · « **Reply #8 on:** October 28, 2017, 08:27:32 AM »

You can not only post pictures.. Dusty sez we love pictures..

but you can ask tech questions. This eclectic bunch of geezers has pretty much BTDT.

oldbike54 · « **Reply #9 on:** October 28, 2017, 08:35:33 AM »

If you want I'll ban that Suzuki forum from WG .

Dusty

bobrebos · « **Reply #10 on:** October 28, 2017, 09:00:04 AM »

No 1971 Honda CB 750 Choppers either!

radguzzi · « **Reply #11 on:** October 28, 2017, 09:01:00 AM »

Quote from: sdcr on October 28, 2017, 07:55:58 AM

Especially, no BMWs...

Copy that...

sdcr · « **Reply #12 on:** October 28, 2017, 09:07:54 AM »

Back in the day, when BMW actually made good looking bikes.

Quote from: radguzzi on October 28, 2017, 09:01:00 AM

Copy that...

bigpants · « **Reply #13 on:** October 28, 2017, 09:37:59 AM »

Ok , well thanks for the go ahead. I wanted to post here cos I know there are experts here , if there weren't my sporti would still be up on blocks.
Ok so here it is - I've got an '87 gsxr1100h slabside. It's been sat for 8 years and I've pulled it out and got the old girl fizzing again. I had a few good but short rides on it and then it started popping and missing around mid revs. Over the next few journeys that got worse until it would happen around 2k. Now here's the weird bit. When it does it all I have to do to fix it is change over the cdi to my spare and she's away again. Next day it's shite when I start it so change back cdi and hey presto. I've gone over all the connectors and they seem fine. Is there anything in a cdi that can get stuck or confused by other systems ( like regulators etc) which would reset itself by the next day ? Wish I could post a pic but not worked out how yet , my phone doesn't like something. Anyway all contributions and advice welcome.

bigpants · « **Reply #14 on:** October 28, 2017, 09:39:07 AM »

Sorry , should I have started a new thread ?

Zoom Zoom · « **Reply #15 on:** October 28, 2017, 09:58:51 AM »

No ExSpurts here. Just drips under pressure.

John Henry

guzzisteve · « **Reply #16 on:** October 28, 2017, 10:23:03 AM »

Could be the box resets & selflearn or not. I would inspect the ignition pickups if your carbs are clean.
NOTE I don't work on GSXR's, just an idea.

bigpants · « **Reply #17 on:** October 28, 2017, 10:36:17 AM »

Carbs seem clean and when I opened them up they showed no signs of gumming up. I do have a spare engine so could try the pick ups thing. Ta.

Orange Guzzi · « **Reply #18 on:** October 28, 2017, 10:42:55 AM »

Three out of four bikes in my garage are not Guzzi. But I do like my Guzzi the best.

oldbike54 · « **Reply #19 on:** October 28, 2017, 10:46:41 AM »

Mr Pants , altered the thread title , no need to start a new one . Someone here will probably steer you in the right direction , good luck .

Dusty

Guzzistajohn · « **Reply #20 on:** October 28, 2017, 10:47:28 AM »

This is a Guzzi forum, what the @#$% are you thinkin'?

LowRyter · « **Reply #21 on:** October 28, 2017, 10:49:57 AM »

Quote from: bigpants on October 28, 2017, 02:37:00 AM

Hi everyone. Is it ok to post here about a non - guzzi bike ? I thought I should ask as I recently posted a pic of my guzzi on a suzuki forum and got deleted ! Jealousy I reckon.

sounds familiar. I used (past tense) to be on Max Suzuki.......

bigpants · « **Reply #22 on:** October 28, 2017, 11:25:14 AM »

I'm not sure what the protocol is so it's either thanks Mr oldbike or thanks Dusty. I'd like to think it's Mr dusty scruff.

LowRyter · « **Reply #23 on:** October 28, 2017, 11:33:41 AM »

so it works when you switch CDI? Maybe the battery? Or battery connection?

oldbike54 · « **Reply #24 on:** October 28, 2017, 11:35:16 AM »

Quote from: bigpants on October 28, 2017, 11:25:14 AM

I'm not sure what the protocol is so it's either thanks Mr oldbike or thanks Dusty. I'd like to think it's Mr dusty scruff.

Either is fine , I'm kinda like the character referenced in my sig line , just call me in time to eat

Dusty

rodekyll · « **Reply #25 on:** October 28, 2017, 11:39:03 AM »

I worked on a Suzuki of that vintage a while back with a similar history. On that one the connector between the cdi pickup on the engine and the cdi control unit was corroded. I cleaned it up and the problem went away.

On another one, some V-twin POS, it was the silly mechanical fuel pump. That one fooled me for a while. It would run until it didn't. We'd tinker with it, and then it would run again. We kept thinking we had the problem licked every time because it would run when we fixed it -- until it didn't. It turns out the pump was having a hard time lifting gas from its low position to the carbs. It would pump enough to start and idle the bike and fill the float bowls (remember these won't actually start until pressure is up and you don't get pressure until the engine is cranking -- a real cluster to troubleshoot through). But it couldn't keep up with the volume required to keep it running at speed. So it would slowly starve, pop, misfire, fart, backfire, and generally misbehave.

All episodes ended in a dead engine. Tinker with it for half an hour (long enough for the pump to recover) and anything tinkered with would then be the "fix" -- until it did it's little death dance again. I finally found the problem when I opened the drain on a float bowl immediately after it died and found it dry. Replaced the pump and filter, ensured proper tank venting, and rerouted the fuel line to give it a better gravity feed. As far as I know that POS is still running.

KiwiKev · « **Reply #26 on:** October 28, 2017, 11:39:22 AM »

Maybe both CDI units are poked ? Not likely I guess but maybe.

Oh yeh as above could be starving for gas - fuel filter blocked ?

bigpants · « **Reply #27 on:** October 28, 2017, 11:55:20 AM »

I did suspect fuel flow as the bike had sat for ages and had surface rust in the tank but I have checked the bowls when not running and always got fuel out. The cdi switching thing is amazingly repeatable and consistent. I can have an engine that misses when I start it , repeat this day after day then switch cdi and it works. Next day back to misses and pops. I'm gonna give it a try now - it's in my living room so it's gonna get smelly.

KiwiKev · « **Reply #28 on:** October 28, 2017, 11:57:57 AM »

Lol, you must be single or the missus is out of town :-)

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bigpants · « **Reply #29 on:** October 28, 2017, 12:13:58 PM »

My beautiful girlfriend lives a beautiful 100 miles away. Hence 5 bikes in my living room. Please don't tell her I said that.

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Author Topic: Question about '87 GSXR . (Read 6338 times)

oldbike54

bobrebos

Orange Guzzi

oldbike54

oldbike54