V50 Monza stock breather box VS pod filters |
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Monza_rider
Falcone Joined: 01 Jun 2020 Location: Belgium Status: Offline Points: 12 |
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Posted: 01 Jun 2020 at 16:31 |
Hi everyone,
I recently acquired a beautiful Monza bike fitted with pod filters and stock jets. It didn't came with the original breather box, the oil overflow of the headers are just connected to a tube that leads to the ground. Doesn't seem ideal imo. I read a lot on the forum, many people suggest the stock breather box is the way to go. What are your opinions? Does anyone have a Monza fitted with pod filters and if so, what rejetting has been done? Kind regards! Jesper
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Chris A
Senior Member Joined: 15 Dec 2018 Location: France Status: Offline Points: 330 |
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Stock box is a complete bar steward when it comes to filter change ..but works the best.For pods to work correctly you need to revise the carburation over the whole range so be prepared to change all the jets and the slide .
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Hi Jesper,
I have a 1982 V35II
with pod filters (found receipts from Gutsibits in paperwork). The richness has been largely (I hope - more testing soon) cured by work to the carbs. New choke mechs (manual at present) , float needles, main needles & needle jets. My bike came with slightly larger pilot jets, otherwise everything is standard, A PO had also hacked the plastic inlet pipes
to fit the pods.... not something I would recommend although it does
ensure the tract remains the right diameter !
If you have decent pods I think you can probably get the bike to run well with
minimal changes to jetting. Cheapo ones I believe can be troublesome. |
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c13pep
Senior Member Joined: 31 Aug 2017 Location: Doncaster Status: Offline Points: 2110 |
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My Monza is fitted with pod filters but I run standard jetting apart from a 130 main jet, however all the jets were renewed on recommissioning.
My breather system consists of plugging up the sump return and routing the rocker box breathers one to each pod filter via a hose connector drilled into the chrome endplate of the pod. Thus oil mist etc. is burnt off in the engine but this does require regular oil level checks. CHRIS |
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you can`t have any fun in a straight line
Monza Honda CB77 project |
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Motty
Senior Member Joined: 03 Jun 2015 Location: South England Status: Offline Points: 269 |
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The original airbox on my V35 disintegrated whilst the bike was in hibernation, it's was a hideous thing anyway (IMHO of course). I prefer the look of the pod filters, it was worth the piddling around with the jets to lose the airbox. Good luck whatever you decide to do
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It’s more fun to try to ride a slow bike fast .....
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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My V50 has pod filters (no idea of the make - they were on when I got it). I have to say that carburation seems fine to me. For some reason my bike has 28mm carbs instead of the 26mm standard ones (possibly related to the fact that it started life as a V35 and had an engine transplant, I believe when it was imported from Italy). I haven't looked at the jetting - as Adrian says "if it ain't broke".
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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Monza_rider
Falcone Joined: 01 Jun 2020 Location: Belgium Status: Offline Points: 12 |
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Thanks for the great responses! Glad to hear people are able to get their bikes running ok with pods. Any recommendations for pod filters? K&N seems the best option?
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Motty
Senior Member Joined: 03 Jun 2015 Location: South England Status: Offline Points: 269 |
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The pod filters I used are whatever brand the Gutsibits were selling, I didn't investigate any further than that. I thought they was K&N, but they may have been K&N copies
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It’s more fun to try to ride a slow bike fast .....
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c13pep
Senior Member Joined: 31 Aug 2017 Location: Doncaster Status: Offline Points: 2110 |
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K & N are the best but I couldn`t find any when I needed them and most now seem to be Chinese copies, which in my case, work fine. When buying a set of pods the size required is 42mm (carburettor boss size) however it is important to ensure that the internal diameter throughout is no less than 28mm otherwise the air flow will be restricted.
CHRIS |
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you can`t have any fun in a straight line
Monza Honda CB77 project |
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telegraphroad
Senior Member Joined: 21 May 2014 Location: M11 J8 Status: Offline Points: 204 |
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I am nearing the end of a long and slow conversion of my V50 Monza back to standard factory air box and filter. I have been gathering the necessary parts for a while and finished the carb rebuild a few days ago. My word it's a faff assembling all that gubbins on to the bike! I'd love to be able to report back on how it compares to the pod filters but since the carb rebuild kit didn't include seals for the choke pistons and I prised the old ones out before I realised - I can't. Why the kit doesn't include these seals I can only imagine, but I note that you can buy new (zinc!) pistons and seal assemblies separately. I've ordered some rubber discs to refurbish my original (brass) pistons so when those arrive I'll be able to set up the carbs and see how things stand. FWIW the bike was on pod filters when I became its latest keeper and was still running on standard jets/needles/atomisers. Not very well I might add. After experimenting with various main jets I settled on 130 as the best compromise. I am expecting to refit the original main jets now that the std air box is fitted.
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V50 Monza
VFR 800FI Herts / Essex border |
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Where did you get your carb kits from??
The Dellorto ones I got from Niks Euro Bits certainly contained the choke "O" rings and a couple of others besides. For my 26mm VHBZ carbs I used kit : COD.52510-77 GUARNIZIONI VHBT Cheers, Adrian Bristol UK |
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Sorry, Just read the post properly !!
No, carb kits do NOT contain the choke seals, only the "O" rings. I replaced mine with manual chokes because they were on a very cheap offer at the time. I reckon you will probably have to shell out for new as I couldn't get the ones out of mine either.. Apologies for the confusion. Adrian Bristol UK |
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Monza_rider
Falcone Joined: 01 Jun 2020 Location: Belgium Status: Offline Points: 12 |
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So only 130 size main jet? No other adjustments of the other jets or needle? Thanks!
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Not sure here, my bike is a V35II but 130 sounds a bit large...
According to my workshop manual standard specs for V50III / Monza /V50C are :- Carbs : 28mm PHBH 28B (D) right (S) left Throttle Valve 50 Atomiser 268T Main Jet 118 Idling / Pilot Jet 50 Starter Jet 60 Needle X6 (3rd notch) Hope this helps.. If the plugs look the right colour then I would keep it as it is. If they don't .... Cheers, Adrian |
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Monza_rider
Falcone Joined: 01 Jun 2020 Location: Belgium Status: Offline Points: 12 |
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Hi Adrian,
Yes, my Monza has the carbs running everything stock. 2 people in this thread said they've tried different jets and both settled on 130 main jet on their Monza's so I figured I'd start there.
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