Yahweh tribute bike

[Flyboy]

No You can't Wally, there is tiny air bleed hole that goes from the front body of the tap, through the diaphram into the back cover, and it has to line up.
But it will work fine as it is, as long as it clears everything.

[wally]

Thanx! Just wanted to double check. Will hopefully get it fitted before weekend. No time this weekend. Going on adventure run with 3 buddies.

[wally]

Installed new petcock, but now there is no spark!

Electric dude installed diodes to indicate when coils are firing. They don't flash...
pulled plugs and earthed it on the frame. Zero spark on any of the plugs...

driving me insane. Just going to take it in to be sorted so I can finally start riding it!

[wally]

Think I found culprit for my no spark issue...

check my my year old battery:



On battery tender full time, but check levels!
kicks out full 0,9 Volts!!!

[wally]

New battery, cleaned out carbs, cleaned out plugs and she fired up! No fuel leaks!

Now I need to work on getting her idling long enough to start making adjustments.
Loads of popping and backfiring though...

[Guest]

Sorry Wally, I've been a bit absent!!

Great news she's firing up ready for tuning!

From memory you have pods yeah? What jets are you running and have you shimmed your needles? My needles are lifted as high as they will go (mine are adjustable), I have 142.5 mains in, and my mixture screws are about 3 turns out from memory...

[wally]

Hi Pete, i have been pretty quiet as well. Checking in daily, but not postin much.

Spoke too soon... Saw slight dribble from left hand carb.

Pods and custom exhaust, but carb still stock. Want to get it running first before doing anything else.
Any recommendations for a ballpark start on jets, etc for my setup?


I know it varies, but i am pretty much at coast level (if it makes a difference...)

[Guest]

To get her running enough to tune, you'll definitely need to get something different with your carbs... I made the mistake of focusing on the needles first but you really should get the mains done first. Of course if she won't idle well then it's hard to get a good start

Essentially it will depend on how free flowing the exhaust and pods are and if your needles are adjustable.

Best I can tell is the US needles are slightly leaner than the Aus needles and aren't adjustable, not sure about the SA ones.

At a bare mimimum I would go up a mimimum of four sizes on the main jets, set your mixture screws at 3 turns out, and your needles up at least one notch if they're adjustable. If they're not, shim them up... you can get a set from eBay cheap and they're great: http://www.ebay.com/itm/TWIN-Carb-Ne...91a9bd&vxp=mtr

Just remember that with my carbs I have also enlarged the vacuum port in the slide and shortened the slide spring, so you will definitely end up with different results to me!

Oh, and if shimming the needles doesn't richen them up enough and they're not adjustable, you'll need to take some fiddly measurements and work out a richer needle to purchase.

[wally]

Had the bike at local auto electrical shop around corner from me, as it is a bit of a mission to get the bike to the bike electrical dude.

Seems like they pinpointed it to the the ignitor gone bad.
There is apparently signals from signal generators, but nothing from the box further onwards.

will take it to the bike dude to get sorted next week.

[Guest]

Bugger Wally! Finding good ignitors for these is a nightmare... my suggestion if he doesn't have an easy solution is to retro-fit the ignition from a later 450 or a GS500. You will need the signal generator, rotor, and ignitor as they're all different and have electronic advance instead of mechanical advance. It should all be bolt on except I imagine the connectors will be different. The advance curve looks close enough it shouldn't cause any issues either. The existing coils should be fine too.

[wally]

Huge day for me today!


Yahweh tribute bike is eventually running on her own steam!

Electrical issue turned out not to be much of an issue. Bought third set of carbs, cleaned and fitted them.
no more fuel leaks!


Got air leak somewhere on carbs causing hanging idle, needs carb adjustments, clutch adjustments and front brake is pulsating, but she runs!!!


Success!!!


Here are the vids:

[nvr2old]

After 2 years, that's gotta feel great, Wally. Way to stay with it and get it running. Does sound like it needs a bit more fiddling, but overall, nicely done. My favorite part of your bike is the tail light and how you fitted the seat back around it.

[wally]

Thanx! The fact that we moved house and work scenario changed helped a bit!

i definitely didn't want the taillight to look like a simple bolt on.
Can't wait to get the seat on!

Hopefully Monday!

[GSX1000E]

Huge day for me today!


Yahweh tribute bike is eventually running on her own steam!

Electrical issue turned out not to be much of an issue. Bought third set of carbs, cleaned and fitted them.
no more fuel leaks!


Got air leak somewhere on carbs causing hanging idle, needs carb adjustments, clutch adjustments and front brake is pulsating, but she runs!!!

Success!!!

Sounds pretty good actually. Try not to look so happy! LOL!

[wally]

I was soooo stoked! Been waiting for this for a long time!