Rear wet plugs RZV500
Moderator: rztom
Rear wet plugs RZV500
Hi all
Can anybody give me list of things to try to cure rear wet plugs.
everything seemed hunky dory after the rebuild and the first 20 mile blasting and traffic riding.
filled her up to the brim this morning and its run like a pig since then.
rear plugs always the problem, good job it wasn't all round the front two cylinders have limped me home.
Just had all four plugs out and the front two although a little dark are dry, rear two especially rear right oily and wet.
new pistons, rings all round. new float valve kits, set the float heights with a glass gauge type can somebody confirm it should be 1 mm below gasket ? Cleaned out carbs
kicks up first time with new plugs in rear then goes like a rocket and then same happens again after a few miles.
now i have de-restricted it and fitted a standard jet kit all round the only thing i didn't change was the rzv needles.
wondering if its surplus oil in the back crank ?
lost for idea's, new to 2 strokes
Will trawl the posts for clues
Dave UK
Can anybody give me list of things to try to cure rear wet plugs.
everything seemed hunky dory after the rebuild and the first 20 mile blasting and traffic riding.
filled her up to the brim this morning and its run like a pig since then.
rear plugs always the problem, good job it wasn't all round the front two cylinders have limped me home.
Just had all four plugs out and the front two although a little dark are dry, rear two especially rear right oily and wet.
new pistons, rings all round. new float valve kits, set the float heights with a glass gauge type can somebody confirm it should be 1 mm below gasket ? Cleaned out carbs
kicks up first time with new plugs in rear then goes like a rocket and then same happens again after a few miles.
now i have de-restricted it and fitted a standard jet kit all round the only thing i didn't change was the rzv needles.
wondering if its surplus oil in the back crank ?
lost for idea's, new to 2 strokes
Will trawl the posts for clues
Dave UK
1984 RZV500R
1985 FZ750 FN
1986 VF500 F2
2016 BMW S1000XR ( i need speed/brakes/handling
1985 FZ750 FN
1986 VF500 F2
2016 BMW S1000XR ( i need speed/brakes/handling
Re: Rear wet plugs RZV500
Hi I had that problem, bike went great for 10-20 minutes then wet plugs.
I set my carbs as this link http://www.rzrd500.com/500phpBB3/viewto ... ter#p66697" onclick="window.open(this.href);return false;
And check your spark plug caps I had problems with those as well. Many things on our bikes are 30+ years old
Hope this helps / Stinke
I set my carbs as this link http://www.rzrd500.com/500phpBB3/viewto ... ter#p66697" onclick="window.open(this.href);return false;
And check your spark plug caps I had problems with those as well. Many things on our bikes are 30+ years old
Hope this helps / Stinke
2 x rd 500 -84
Rd 350 ypvs -84
Rd 250 -74
Kh400, t20
The best of swedish metal: https://youtu.be/gkBt7yLXyDk" onclick="window.open(this.href);return false;
Rd 350 ypvs -84
Rd 250 -74
Kh400, t20
The best of swedish metal: https://youtu.be/gkBt7yLXyDk" onclick="window.open(this.href);return false;
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Re: Rear wet plugs RZV500
Or you just have low compression on the rear cylinders and, thus, poor combustion.
Re: Rear wet plugs RZV500
Did you rebuild the bottom end, new (Yamaha)crank seals?
Is it smoking at the tailpipe on all 4?
Is it smoking at the tailpipe on all 4?
Colin
Re: Rear wet plugs RZV500
Thanks for all the tips. Will check them all.
New Genuine crank seals all round, smokes on 4 lovely when plugs are all firing.
Do i compression check cold,hot,engine running?
Will triple check float heights again just don't trust the float
Bowl off method prefer the Yamaha tube. But what's the correct
Measurement for that?
Will report updates
New Genuine crank seals all round, smokes on 4 lovely when plugs are all firing.
Do i compression check cold,hot,engine running?
Will triple check float heights again just don't trust the float
Bowl off method prefer the Yamaha tube. But what's the correct
Measurement for that?
Will report updates
1984 RZV500R
1985 FZ750 FN
1986 VF500 F2
2016 BMW S1000XR ( i need speed/brakes/handling
1985 FZ750 FN
1986 VF500 F2
2016 BMW S1000XR ( i need speed/brakes/handling
Re: Rear wet plugs RZV500
Simply try replacing the plugs as they may have fouled early due to excess assembly oil etc. Cheap possible problem solver.
Regards,
Bill Wilson
Wilson Performance
Lee's Summit, MO
http://www.wilsonperformance.net
Member RZ500 Owners Group #573
816-377-3185
WVWRZ500N@aol.com
Bill Wilson
Wilson Performance
Lee's Summit, MO
http://www.wilsonperformance.net
Member RZ500 Owners Group #573
816-377-3185
WVWRZ500N@aol.com
Re: Rear wet plugs RZV500
Im not sure I ever routed my choke cables correctly upon reassembly and ever since I've unbolted my choke lever... I just let it dangle as I noticed uneven pull on the cables while it was mounted in that cockeyed position it's in from the factory
Re: Rear wet plugs RZV500
http://www.rzrd500.com/500phpBB3/viewto ... =3&t=14107" onclick="window.open(this.href);return false;
Updated my outcome on this guy's post
Updated my outcome on this guy's post
1984 RZV500R
1985 FZ750 FN
1986 VF500 F2
2016 BMW S1000XR ( i need speed/brakes/handling
1985 FZ750 FN
1986 VF500 F2
2016 BMW S1000XR ( i need speed/brakes/handling
Re: Rear wet plugs RZV500
I do love a happy ending, nice one mate.dave55 wrote:http://www.rzrd500.com/500phpBB3/viewto ... =3&t=14107
Updated my outcome on this guy's post