Top posting users this month
adespin
 
JohnW
 

Top posting users this week
adespin
 
JohnW
 

Who is online?
In total there is 1 user online :: 0 Registered, 0 Hidden and 1 Guest

None

[ View the whole list ]


Most users ever online was 29 on Tue 30 May - 4:54
Latest topics
» 1994 T80 Grey Townmate
Today at 5:33 by JohnW

» Anybody Out There
Yesterday at 23:18 by adespin

» North Coast 500
Sun 27 Aug - 22:01 by Dave Weller

» Problem with headlight'dipswitch
Tue 22 Aug - 0:41 by Mark1982.

» soutern softies
Mon 21 Aug - 8:58 by Mark1982.

» Another Japanese home market (grey import) T80
Thu 17 Aug - 7:21 by JohnW

» Front brake upgrade
Thu 17 Aug - 5:24 by adespin

» gear change
Sat 12 Aug - 21:54 by JohnW

» yamaha v75 1974
Sun 6 Aug - 22:01 by JohnW


Air Filter Pod

View previous topic View next topic Go down

Air Filter Pod

Post  3hundredspartans on Mon 3 Mar - 9:37

Hi All,

Just contemplating putting an air pod filter on the T80. Has anyone tried to do so?

Is there any improvement in performance, not that I am looking for any really, just curious.

Any thoughts/suggestions welcom.

Regards, Frank.

3hundredspartans

Posts : 218
Join date : 2012-04-17
Age : 49
Location : Sydney, Australia

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Mon 3 Mar - 9:50

3hundredspartans wrote:Hi All,

Just contemplating putting an air pod filter on the T80. Has anyone tried to do so?

Is there any improvement in performance, not that I am looking for any really, just curious.

Any thoughts/suggestions welcom.

Regards, Frank.

No point as original air filter is more than adequate, just wash out the filter pad or replace it with a new one, plenty on eBay

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Sun 16 Mar - 10:04

I put a foam "k and m" filter on mine (not really thru choice my air box is broken looking for a replacement) i dont think its an improvement ..if it was i'd say yamaha would have fitted one too ! but when i get me airbox i'll do a timed 100 yard standin start an compare the 2..hows that eh ?

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Admin drgaz on Sun 16 Mar - 10:22

I Think little or no difference apart from induction noise may be, where are you Frankie uk?
avatar
Admin drgaz
Admin

Posts : 526
Join date : 2011-03-23
Age : 58
Location : Leicestershire

View user profile http://www.minigallery.co.uk/Anne_Twist/      http://bazzarpixie

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Sun 16 Mar - 10:30

yes UK

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Admin drgaz on Sun 16 Mar - 10:49

10/4 on that
avatar
Admin drgaz
Admin

Posts : 526
Join date : 2011-03-23
Age : 58
Location : Leicestershire

View user profile http://www.minigallery.co.uk/Anne_Twist/      http://bazzarpixie

Back to top Go down

Re: Air Filter Pod

Post  barker on Mon 17 Mar - 3:50

I think I have a air filter in my shed if you still want one let me know

barker

Posts : 451
Join date : 2011-03-25
Location : littlehampton

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Fri 21 Mar - 4:35

Barker, thanks for the offer (i think it was me your talking to) didnt see your reply 'till today. I got one , its on its way ..ta  Very Happy 

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Fri 21 Mar - 4:41

I tried a top speed run on the t80 with the k n N fiter fitted .. wide open throttle , down hill , induction noise was deafening...then silence..apart from the locked up back wheel skidding on the tarmac... are oversize pistons freely available for the t80 ? think i may need one !

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Fri 21 Mar - 9:47

Frank1e wrote:I tried a top speed run on the t80 with the k n N fiter fitted .. wide open throttle , down hill , induction noise was deafening...then silence..apart from the locked up back wheel skidding on the tarmac... are oversize pistons freely available for the t80 ? think i may need one !

Plenty on eBay Std & oversize. http://www.ebay.co.uk/sch/i.html?_trksid=p2050890.m570.l1313.TR0.TRC0.H0.XYamaha+t80+Townmate+pistons&_nkw=Yamaha+t80+Townmate+pistons&_sacat=0&_from=R40
Are you sure its the piston that's seized?

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Thu 27 Mar - 2:01

yes seized piston .. free'd up again an i rode it home. Stripped top end piston had seized at 4 corners of the skirt , not much damage cleaned up ok , i reduced skirt clearance, checked bore clearance all ok .. i put it down to non standard air filter an it runnin too hot Shocked 

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Thu 27 Mar - 5:03

Frank1e wrote:yes seized piston .. free'd up again an i rode it home. Stripped top end piston had seized at 4 corners of the skirt , not much damage cleaned up ok , i reduced skirt clearance, checked bore clearance  all ok .. i put it down to non standard air filter an it runnin too hot Shocked 
Is there enough oil in the engine? a seizure is more likely through lack of oil. Also if oil is ok might be worth checking the oil pump is working (you need to remove drive side crankcase cover) I have known the pump drive gear to come loose on its shaft & strip teeth, thus causing pump to stop working, resulting in piston seizure

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Thu 27 Mar - 7:34

Oil amount and delivery is good..plenty of oil . Not a friction seizure this one, expansion seizure,bit like a rebore thats too tight..nips up when hot..
too much air in mix ..runs too hot with that filter..larger main jet would be needed..I fink so anyways..

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Mon 26 May - 21:47

No i was wrong about that...sieze up had little to do with k&n air filter .. fitted standard box and filter and the engine seized again !..piston to bore clearance,too tight.
but engine run much better with standard box fitted
getting 50 mph .. but still running rich on full throttle..too rich..worn main jet maybe..aye maybe...

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Mon 26 May - 22:04

Frank1e wrote:No i was wrong about that...sieze up had little to do with k&n air filter .. fitted standard box and filter and the engine seized again !..piston to bore clearance,too tight.
but engine run much better with standard box fitted
getting 50 mph .. but still running rich on full throttle..too rich..worn main jet maybe..aye maybe...

It may of course have been recently rebored by a previous owner so wants running in, anyway 50 mph is a tad high for a T80 I keep mine to 45, at 50 it vibrates

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Wed 28 May - 22:24

Yes i keep my t80 at 40-45mph , bikes design is more suited to that laid back speed .

I would move the needle clip position up a notch if it was easy an didnt disturb those fragile seals .. i may have to , fuel consumption could be better too.
Runnin too rich at WOT..

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Wed 28 May - 22:47

Frank1e wrote:Yes i keep my t80 at 40-45mph , bikes design is more suited to that laid back speed .

I would move the needle clip position up a notch if it was easy an didnt disturb those fragile seals .. i may have to , fuel consumption could be better too.
Runnin too rich at WOT..

Might be the main jet too large as on full throttle (which you say you run it at) the carb would be on main jet rather than the needle. But who would change a main jet in a T80? That is if you can get a larger one. The correct jet is No 85, you can get to this by taking the float bowl off (4 screws) no need to disturb seals. You will need a new gasket though (sets on eBay). Have you also checked that the choke is returning to off position, cable may be seized or spring weak. As for engine seizing, this may be due to a worn or malfunctioning oil pump. I have known oil pumps to come loose, this causes oil starvation & piston seizes. The oil pump is on the right had (drive side) cover so you would need to take that off to check, again you will need a new gasket (eBay) & maybe new screws as the originals may chew up when removing. Best to replace with socket head screws.

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Frank1e on Thu 29 May - 3:40

Seals have to be disturbed to adjust needle position .. and needle position opens and closes main jet orifice (earlier or later and its progressive)

main jet is standard .. jets can easily be enlarged by cleaning them out with a piece of wire or such like..its happened before...

Frank1e

Posts : 51
Join date : 2014-03-15

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Thu 29 May - 18:34

Frank1e wrote:Seals have to be disturbed to adjust needle position .. and needle position opens and closes main jet orifice (earlier or later and its progressive)

main jet is standard .. jets can easily be enlarged by cleaning them out with a piece of wire or such like..its happened before...

Best to try another carb, Admin drgaz may still have one for sale that came from a running bike so should be OK

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  teapot on Thu 29 May - 18:44

I've played about with the jetting on these carbs quite a lot, from extremes of lean to very rich, but never had an engine tighten up even at full throttle for several miles.

However I have had one with a faulty oil pump. Some of the teeth had stripped off the cog and it would only turn some of the time  rabbit 
This one did sieze.

Take the clutch cover off and check the condition of the oil pump drive cogs and ensure the half-moon shaped shaft is turning with the cog and isn't rounded off. Also check the oil strainer near the drain plug.

If after all this you are sure that it is still the carb, I have quite a few spare carb internals and could probably fix (and test) it if you sent it to me.

teapot

Posts : 29
Join date : 2014-05-25

View user profile

Back to top Go down

Re: Air Filter Pod

Post  JohnW on Fri 30 May - 0:44

teapot wrote:

However I have had one with a faulty oil pump. Some of the teeth had stripped off the cog and it would only turn some of the time  rabbit 
This one did sieze.


This usually happens if the two countersunk screws holding the pump in place come loose. As for the carb, as I said in a previous comment, rich running is more likely to be due to the choke butterfly not returning properly, either because the cable has seized or because the spring that returns it to the open position is broken or week. Take off the air hose off the carb & see if the butterfly coke is opening when the choke lever is released. Note its push to the left to close & push to right to open choke. Is the choke lever in the correct position?

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: Air Filter Pod

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum