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Pigfords OLD effort......now JULES NEW PROJECT!!!!!

Work in Progress

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Pigford
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#256 PostAuthor: Pigford » Sun May 24, 2009 8:39 pm

Thanx to Al (Zorded) - I have finally managed to degree me cams in :o

Al loaned me his 'top guide deflection tool' so I could check the inlet cam. As it happens, when this was fitted, it only altered the timing by a few degs.

Anyhow, the engines all back together & running.... but the f**ker still tends to hang up on the revs :cry: :?? :evil:

The carbs are a bit out so will haved to spend yet more time fiddling :!:

I checked the inlet rubbers (sprayed duck oil on them whilst running) and don't seem to be leaking.

Double checked the timing - was a bit retarded (33 degs BTDC) so set to 38degs.

Last resort will be to try another (standard) head & cams...... :??

Gotta concerntrate on the Trumpet first coz its due for MOT 6 June :shock:
And on the 7th day... Zeds were created!
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#257 PostAuthor: Ginger Bear » Sun May 24, 2009 9:38 pm

Piggy...... Wot a pi**er.
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#258 PostAuthor: Dodgy Z1B » Sun May 24, 2009 9:40 pm

Got to be carbs for sure, not got any1 with a dyno near you to check it out.
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#259 PostAuthor: Pigford » Mon May 25, 2009 7:52 am

Dodgy............... But I tried some RFS36's carbs off me black Z1000, which were OK, but it did the same thing when fitted on this b*gg*r.... :??

Been suggested it could be a hairline crack in me head :shock:

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#260 PostAuthor: mick znone » Mon May 25, 2009 8:01 am

sorry to hear that Piggy, hope its not costly :o
I DONT CARE, IN OR OUT BUT IM ENJOYING THE DEBATE......................ARMSTRONG MT500. a pushbike, waves.....addict, no offence
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#261 PostAuthor: Padders » Mon May 25, 2009 8:13 am

Keep at it Mark I am sure you will get there. Remember you have that lovely Triumph to pop out on and take your mind off the problems. Lucky ba**ard.
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#262 PostAuthor: Pigford » Sat Aug 15, 2009 4:23 pm

OK.... been having a bit of a fiddle again... :??

The cams are degreed in OK (both about 108/109).......

I have checked the Dyna S & bob weight springs (nice & tight) and ran the bike up....

Still HANGING UP on the revs...... Tried the RS38's & some std 34mm CV's...

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The engine is NOT fully warmed up & the carbs are standard jetting (I think) - but it still started up fairly well..... even without the air box, which is surprising for gripey CV carbs :|

Rubbers don't leak... throttle cable loose & returns OK.....

My thought now is:
The cams (still unknown make) are a bit lumpy & they may be over lapping too much (or sumink) as the carbs do seem to be spitting fuel back. This means that even though the idle seems low - its the cams struggling to keep the idle, so when you blip the throttle, the revs pick up, the motors running nicely and gas is flowing at a more optimum mix... so the revs catch & hold high :?: :evil: :evil: :?? :?? :shock: :shock:
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#263 PostAuthor: Ginger Bear » Sat Aug 15, 2009 7:21 pm

Piggy, I have a set of standard GPz cams you can borrow if you want.
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#264 PostAuthor: Pigford » Sun Aug 16, 2009 8:45 am

Thanks GB.................. May well have to try that route, I suppose :cry:

Gonna have a little think about the whole situation, before I wheel it down to the local tip :??
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#265 PostAuthor: chrisNI » Sun Aug 16, 2009 10:22 am

Pigford wrote:Thanks GB.................. May well have to try that route, I suppose :cry:

Gonna have a little think about the whole situation, before I wheel it down to the local tip :??


Pigford I have just been reading this whole thing - I understand you don't know what the cams that are in it are is that right so you have really no idea what they should be timed at. I think a set of standard cams or at least a set of cams that you have a figure for is a lot better of an idea than a trip to the tip.
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#266 PostAuthor: hillbilly » Sun Aug 16, 2009 1:34 pm

pigford ,just as a question,is the barrels and head off a gpz1100.
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owing p.u.m. (76 z1b)(v reg z1r)
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#267 PostAuthor: Pigford » Sun Aug 16, 2009 2:36 pm

Barrels off a Uni-track, head I think is the original ELR, but gas flowed.

Main thing is compression ratio is Ok ( 10.24 : 1 ) and compression good.
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#268 PostAuthor: london calling » Sun Aug 16, 2009 3:56 pm

Piggy stick to what you know best :wink:
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Get one of these little beauties and IRON out any problems you're having :lol: :lol:
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#269 PostAuthor: hillbilly » Sun Aug 16, 2009 4:08 pm

even a small crack in the head wunt have that effect,maybe the cams have been ground wrong, :?: ide try 36 carbs with standard cams, :wink: at 1260 you can get some larger cams to suit,once its behaving. :wink:
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owing p.u.m. (76 z1b)(v reg z1r)
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#270 PostAuthor: Pigford » Sun Aug 16, 2009 4:42 pm

Hillbilly..... its only 1170..... :| And have tried the RFS36's off me black Z1000 (which work OK on that) but on the Lawson - same thing :evil:

next is try different cams.... Also got a spare standard head in reserve :!:
And on the 7th day... Zeds were created!
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