79 z problems - FIDDY TECH: Help, How-to, Parts & Mods

justahondaman · 12-05-2004, 11:56 PM

restoring my 79 z50 all stock i just put a new top end in it and now it will start and run for about 5 sec and die i put 3 different carbs on it thinking that was the problem but they all did the same things it has good compression. i am lost dose anyone have any sugestions

BLACK DEATH · 12-06-2004, 12:57 AM

Might be a spark issue. Are you sure the carbs you are using are in working order? Or do they work on another bike at least? My bike would still run even though the carb needed to be rebuilt bad.

Z50NATIONALS · 12-06-2004, 01:26 AM

whats the plug look like justin?
black or white?
also check your cam timing/along with your point timing
if you cant figure it out pm me and you can bring it over and we can take a look see

justahondaman · 12-06-2004, 11:34 AM

Quote:

Originally Posted by Z50NATIONALS

whats the plug look like justin?
black or white?
also check your cam timing/along with your point timing
if you cant figure it out pm me and you can bring it over and we can take a look see

cool i really think it is ign. problems i have the timing set right, but i am not sure what you mean by point timing? as for the plug color it dose not run long enough to get a good reading i am going to pull the fly wheel at work tuesday and clean it really good and see if that helps .
brake cleaner wont hurt it, right?

900 Fury · 12-06-2004, 02:09 PM

OHH man points....
Best advice, let a trained professional set them for you. IF you set them wrong or they are goofed up, the bike WILL not run no matter how bad you want it to. Thank goodness for CDI...

Z50NATIONALS · 12-06-2004, 04:36 PM

contact cleaner is fine justin
points are easy
not as easy as cdi heheheheh
set your gap first .0013 (business card thickness if you dont have a feeler gauge) then set the point to open at the f mark
did you check the cam timing while you were looking
an old cam chain will give you the same symptoms of bad timing check and see where it is at and see how much slop it has

fab5fiddy · 12-06-2004, 05:05 PM

.013 z50NAT. .0013 is thinner than a sheet of paper.

sorry to correct u. just dont to screw anyone up.

BelliSSimO · 12-07-2004, 09:39 PM

you might need new points because mine did what yours did a couple times (starts and runs for 5 seconds then die)before the spark finally disappeared. also if your points havent been replaced in a long long time it might be a good idea to replace those.

also points gap is easy to set just turn the flywheel a little past the F mark to where the points are open the most, and this is where you wanna take the gap measurement from.

oh yeah, use a feeler gauge like fab said, i don't believe a business card is too accurate

Z50NATIONALS · 12-08-2004, 03:46 PM

yep my bad fab
.013 which is the same thickness as a business card,but feeler gauges are cheap at the local car parts store i would recommend buying one if you have points and you need them to adjust your valves too so a handy lil tool to have
more than likely justin if the points are right the condensor is bad
that will cause an irradict spark and do like you say its doing
bring it by if you dont get it figured out

12-05-2004, 11:56 PM	#1
justahondaman Registered User Join Date: Oct 2004 Location: Arlington texas Age: 23 Bike: CRF 450, CRF 50, xr 650 Gender: Male Posts: 20	79 z problems restoring my 79 z50 all stock i just put a new top end in it and now it will start and run for about 5 sec and die i put 3 different carbs on it thinking that was the problem but they all did the same things it has good compression. i am lost dose anyone have any sugestions

12-06-2004, 12:57 AM	#2
BLACK DEATH Registered User Join Date: Dec 2003 Location: In Her Dirty South TX. Age: Bike: 02 SE BUSA, 84 Z50R, 91 Z50R, 03 XR50, 02 XR100, 99 Z50R, 91 Z50R needs help, painting it all black Gender: Male Posts: 189	Re: 79 z problems Might be a spark issue. Are you sure the carbs you are using are in working order? Or do they work on another bike at least? My bike would still run even though the carb needed to be rebuilt bad. __________________ 02 SE Busa, 02 GSXr 600, 03 xr50, 91 z50r, 84 z50r, 02 xr100

12-06-2004, 01:26 AM	#3
Z50NATIONALS Registered User Join Date: Jan 2004 Location: DALLASS Age: 42 Bike: ZRX100 ,03 XR50,72 YAMAHA R5 Gender: Male Posts: 657	Re: 79 z problems whats the plug look like justin? black or white? also check your cam timing/along with your point timing if you cant figure it out pm me and you can bring it over and we can take a look see

12-06-2004, 02:09 PM	#5
900 Fury Registered User Join Date: Oct 2002 Location: Woodridge, IL Age: 30 Bike: 1998 z50, xr50/z88 hybrid Gender: Male Posts: 1,216	Re: 79 z problems OHH man points.... Best advice, let a trained professional set them for you. IF you set them wrong or they are goofed up, the bike WILL not run no matter how bad you want it to. Thank goodness for CDI...

12-06-2004, 04:36 PM	#6
Z50NATIONALS Registered User Join Date: Jan 2004 Location: DALLASS Age: 42 Bike: ZRX100 ,03 XR50,72 YAMAHA R5 Gender: Male Posts: 657	Re: 79 z problems contact cleaner is fine justin points are easy not as easy as cdi heheheheh set your gap first .0013 (business card thickness if you dont have a feeler gauge) then set the point to open at the f mark did you check the cam timing while you were looking an old cam chain will give you the same symptoms of bad timing check and see where it is at and see how much slop it has

12-06-2004, 05:05 PM	#7
fab5fiddy I Enjoy Posting At StuntLife! Join Date: Jun 2003 Location: Cleveland,OH Age: 31 Bike: 03' XR FIDDY / 900RR Gender: Male Posts: 2,287	Re: 79 z problems .013 z50NAT. .0013 is thinner than a sheet of paper. sorry to correct u. just dont to screw anyone up. __________________ ~fab5fiddy www.FIDDYboyz.com FIDDYboyz@adelphia.net

12-07-2004, 09:39 PM	#8
BelliSSimO I Chose to No Longer Post Join Date: Aug 2004 Location: Chardon,Ohio Age: 23 Bike: 95 600F3 xr 400 kdx220 atc 70 Gender: Male Posts: 95	Re: 79 z problems you might need new points because mine did what yours did a couple times (starts and runs for 5 seconds then die)before the spark finally disappeared. also if your points havent been replaced in a long long time it might be a good idea to replace those. also points gap is easy to set just turn the flywheel a little past the F mark to where the points are open the most, and this is where you wanna take the gap measurement from. oh yeah, use a feeler gauge like fab said, i don't believe a business card is too accurate

12-08-2004, 03:46 PM	#9
Z50NATIONALS Registered User Join Date: Jan 2004 Location: DALLASS Age: 42 Bike: ZRX100 ,03 XR50,72 YAMAHA R5 Gender: Male Posts: 657	Re: 79 z problems yep my bad fab .013 which is the same thickness as a business card,but feeler gauges are cheap at the local car parts store i would recommend buying one if you have points and you need them to adjust your valves too so a handy lil tool to have more than likely justin if the points are right the condensor is bad that will cause an irradict spark and do like you say its doing bring it by if you dont get it figured out