Exhaust Cam on Inlet Side

Just wondering,would fitting an exhaust cam on the inlet side and tweaking the cam timing (slotted cam pulleys) gain much extra hp??
Anyone here done it yet?

It's a trick that's done on other bikes,and it works well.

Why…just why?

The Silverwing is a touring class scooter. Not a hooligan hayabusa. 

It’s been said that the Silverwing was developed by a Zen master so that he could enjoy the cherry blossoms falling.







Feet forward, enjoy the ride.

I'm quite fascinated reading this list of bits and parts that Japcati is either purchasing or enquiring about. To be a 'new' Silver Wing owner and within a few days of ownership and with limited experience of it's  strengths to have such a comprehensive shopping list.

Does not matter what you do, you end up with scooter.....probably not as good as Honda designed it.

Hi,
Agree with all of the above, sounds like you are looking for an entirely different bike.

The Silverwing is a touring maxi scooter with plenty of power for real world riding.

Lads,I race and track race bikes on various European Tracks.
I ride 200+hp super bikes on the road aswell.
I like messing around with bikes and seeing what can be done with them.
So please don't start with all this crap of "it's a scooter and go look for a different bike instead".

I hate those type of snide, moronic and ignorant posts.
Keep them to yourself,if that's all you have to say.
Thanks.

Hi Japcati,

Don’t think anyone on here is a moron just offering a bit of advice as there is a lot of scooter riding spannering experience on here.

JamieB wrote:

Hi Japcati,

Don’t think anyone on here is a moron just offering a bit of advice as there is a lot of scooter riding spannering experience on here.

Nobody has actually offered or given any actual advice here so far,just the usual snide,ignorant and moronic comments that I was kinda expecting,as I posted this topic.

So if these people cant help or dont want to help with proper information or technical information,then they should just keep those  type of "comments" to themselves.

Thanks.

Meldrew wrote:

I'm quite fascinated reading this list of bits and parts that Japcati is either purchasing or enquiring about. To be a 'new' Silver Wing owner and within a few days of ownership and with limited experience of it's  strengths to have such a comprehensive shopping list.

FYI.....I've been riding maxi scooters for quite a number of years,modified and tuned up a few too while not racing or doing European track events.
I've also tuned up almost all of my current road going Touring Bikes,Supermotards,and Superbikes too.

Now before you try get all smart or thick with me again, who said I havent googled about Silverwing tuning and modifying, and its weakness too,before purchasing my Silverwing.

Presumption is the mother of all fcukups,so dont ever presume again.
So on that note,I suggest you engage your brain,before you type any more posts here.


Enjoy your Saturday evening.

Where's Iteland ?

terrier wrote:

Where's Iteland ?  

That's the best you can do,really????

Jesus fcukin wept........

Don't get your knickers in a twist. Just asking a simple question. Chill

terrier wrote:

Don't get your knickers in a twist. Just asking a simple question. Chill

I'm amazed with your technical and tuning knowledge and posts here,absolutely amazed by them....
You have an enjoyable Saturday evening now.

Thank you for your kind words. All noted and filed appropriately

Japcati wrote:

I've also tuned up almost all of my current road going Touring Bikes,Supermotards,and Superbikes too.

If you're such a whizz on the track, and in the workshop with this stable tuned up of tuned up road bikes you say you have, why are you asking about trying to get a bit more poke out of maxi scooter that has long been considered an old mans bike. (I kind of switched off when you mentioned riding 200+ hp road bikes on the roads of Iteland )

Meldrew wrote:

Japcati wrote:

I've also tuned up almost all of my current road going Touring Bikes,Supermotards,and Superbikes too.

If you're such a whizz on the track, and in the workshop with this stable tuned up of tuned up road bikes you say you have, why are you asking about anything on here. (I kind of switched off when you mentioned riding 200+ hp road bikes on the roads of Iteland )

Why do you feel the need to be a wannabe smart arse twat??

You ask questions to gain knowledge that you might not know of yet.

Now,if you cant post in a nice meaningful manner in the very 1st place, then you should please sit down,stop posting to me, and STFU.

Enjoy your evening.

Thanks.

Japcati wrote:

Why do you feel the need to be a wannabe smart arse twat??

It comes natural to me, some say it's a gift, and I'm paid a handsome retainer to be a Visiting Curmudgeon. I'm brightening up your mundane life, getting your post count up, and you've finally learned how to spell Ireland correctly.

Keep replying, I'm enjoying my evening.

Meldrew wrote:

Japcati wrote:

Why do you feel the need to be a wannabe smart arse twat??

It comes natural to me, some say it's a gift,  and I'm paid a handsome retainer to be a Visiting Curmudgeon. I'm brightening up your mundane life, getting your post count up, and you've finally learned how to spell Ireland correctly.

Keep replying, I'm enjoying my evening.

Nah mate,I dont entertain clueless fools like your good self,who's only quip is to try be all big and smart here by posting useless crap,and from your 1st post here on this thread.
.
And you my friend,are clearly 1 of those people.
Your very own posts show you up as a person who wants to be seen as all smart,and a wannabe know it all twat.But my dear friend,the reality of your posts is that you haven't got a fcuking clue.

So on that note,I'll leave you to it.

Japcati wrote:

Meldrew wrote:

Japcati wrote:

Why do you feel the need to be a wannabe smart arse twat??

It comes natural to me, some say it's a gift,  and I'm paid a handsome retainer to be a Visiting Curmudgeon. I'm brightening up your mundane life, getting your post count up, and you've finally learned how to spell Ireland correctly.

Keep replying, I'm enjoying my evening.

Nah mate,I dont entertain clueless fools like your good self,who's only quip is to try be all big and smart here by posting useless crap,and from your 1st post here on this thread.
.
And you my friend,are clearly 1 of those people.
Your very own posts show you up as a person who wants to be seen as all smart,and a wannabe know it all twat.But my dear friend,the reality of your posts is that you haven't got a fcuking clue.

So on that note,I'll leave you to it.

You’re throwing out a lot of disparaging remarks for the new lad here. We’d like to hear (well some of us anyway) more about your projects. But you’ll need to read the room and mind your manners.

However to your inquiry regarding extracting the maximum of power from the FSC/FJS engine. When it gets down to the bottom line, any mods made will likely be hamstrung by the ECM.

Cosmic_Jumper wrote:

Japcati wrote:

Meldrew wrote:

Japcati wrote:

Why do you feel the need to be a wannabe smart arse twat??

It comes natural to me, some say it's a gift,  and I'm paid a handsome retainer to be a Visiting Curmudgeon. I'm brightening up your mundane life, getting your post count up, and you've finally learned how to spell Ireland correctly.

Keep replying, I'm enjoying my evening.

Nah mate,I dont entertain clueless fools like your good self,who's only quip is to try be all big and smart here by posting useless crap,and from your 1st post here on this thread.
.
And you my friend,are clearly 1 of those people.
Your very own posts show you up as a person who wants to be seen as all smart,and a wannabe know it all twat.But my dear friend,the reality of your posts is that you haven't got a fcuking clue.

So on that note,I'll leave you to it.

You’re throwing out a lot of disparaging remarks for the new lad here. We’d like to hear (well some of us anyway) more about your projects. But you’ll need to read the room and mind your manners.

However to your inquiry regarding extracting the maximum of power from the FSC/FJS engine. When it gets down to the bottom line, any mods made will likely be hamstrung by the ECM.

People want to be all smart with me from the word go,then they will get it back off me 10 fold.
I asked a specific question,that so far nobody has actually answered,or seems to be capable of answering,and yet all these people can do is post the usual stupid,snide,idotic and moronic posts.

You wanna talk about manners??
Maybe direct that comment of yours towards those members in question with regards "their" posts,including "your own initial post" here too.
Thanks for your posts and your "thoughts" with regards that matter..

Oh and the ECU and its coding can be easily rewritten and live mapped on the dyno,which I will be happy to have done by a mapping friend of mine,once I have fitted all the supporting tuning parts and performed the various modifications.

Cylinder head and exhaust headers are a serious bodge job by Honda.....(zen master me hole).....which can be made much better,if addressed properly,which I will do.

Cams are different intake has a lobe on end for Cam pulse pick up. Sensor in head for engine timing control etc.   Exhaust cam has a bit more lift  than intake but it won't work.   I'll stay out of this other than that.  Ride On.

Mech 1 twa wrote:

Cams are different intake has a lobe on end for Cam pulse pick up. Sensor in head for engine timing control etc.   Exhaust cam has a bit more lift  than intake but it won't work.   I'll stay out of this other than that.  Ride On.

Thanks for the reply and info.

Looks like a set of regrinds from Web Camshafts or Kent Cams so. Might contact Newman Camshafts too,they reground a set of VTR cams for me before.

Bit of head work,deburing and polishing,and sorting out the restrictive Honda exhaust headers,and that should free up a few extra ponies.

Japcati wrote:

Mech 1 twa wrote:

Cams are different intake has a lobe on end for Cam pulse pick up. Sensor in head for engine timing control etc.   Exhaust cam has a bit more lift  than intake but it won't work.   I'll stay out of this other than that.  Ride On.

Thanks for the reply and info.

Looks like a set of regrinds from Web Camshafts or Kent Cams so. Might contact Newman Camshafts too,they reground a set of VTR cams for me before.

Bit of head work,deburing and polishing,and sorting out the restrictive Honda exhaust headers,and that should free up a few extra ponies.

Here’s a link to an earlier discussion about engine mods: 
https://www.silverwing600.com/t4038-engine-mods?highlight=Engine+mods

Also Search gavindavies posts. IIRC he’s done quite a few impressive mods.

Cosmic_Jumper wrote:

Japcati wrote:

Mech 1 twa wrote:

Cams are different intake has a lobe on end for Cam pulse pick up. Sensor in head for engine timing control etc.   Exhaust cam has a bit more lift  than intake but it won't work.   I'll stay out of this other than that.  Ride On.

Thanks for the reply and info.

Looks like a set of regrinds from Web Camshafts or Kent Cams so. Might contact Newman Camshafts too,they reground a set of VTR cams for me before.

Bit of head work,deburing and polishing,and sorting out the restrictive Honda exhaust headers,and that should free up a few extra ponies.

Here’s a link to an earlier discussion about engine mods: 
https://www.silverwing600.com/t4038-engine-mods?highlight=Engine+mods

Also Search gavindavies posts. IIRC he’s done quite a few impressive mods.

Thanks for that.
Banged off an email to both web cams and Newman cams last night,while watching the F1 qualifying highlights.
So be interesting to see what they both say in their replies.

This little engine would be quite impressive at 75HP in a SW. tweaking it costs $$$ to get there.
Limits are the drive system and the way it works not like a manual shift bike. It revs. high enough at 8500 but can't tap that most of the time. Intake and exhaust ports are small and exhaust header has some terrible welds in there at flanges and thin. Throttle bodies are another limit. A little more lift and duration on intake side should work but piston to valve clearance needs to verified.

You say this PCM can be remapped? That would be nice.

Mech 1 twa wrote:

This little engine would be quite impressive at 75HP in a SW.  tweaking it costs $$$ to get there.
Limits are the drive system and the way it works not like a manual shift bike. It revs. high enough at 8500 but can't tap that most of the time. Intake and exhaust ports are small and exhaust header has some terrible welds in there at flanges and thin. Throttle bodies are another limit. A little more lift and duration on intake side should work but piston to valve clearance  needs to verified.

You say this PCM can be remapped? That would be nice.

Is there any known upgrade or mods for the throttlebodies?
Or is it a case of milling/boring them out by a milimeter or 2 and fitting larger butterfly plates?

I don't know of any throttle body upgrades but it could be done maybe? There are coolant passages in them but who knows how far they can be opened? Those plate screws are are sometimes tweaked to prevent them from coming loose and need to be ground to get them out without damaging threads in throttle opening bars. If you go that route be sure to use new screws and loctite them.

Mech 1 twa wrote:

I don't know of any throttle body upgrades but it could be done maybe? There are coolant passages in them but who knows how far they can be opened?   Those plate screws are are sometimes tweaked to prevent them from coming loose and need to be ground to get them out without damaging threads in throttle opening bars.   If you go that route be sure to use new screws and loctite  them.

Thanks for the info and advice.

Meldrew wrote:

I'm quite fascinated reading this list of bits and parts that Japcati is either purchasing or enquiring about. To be a 'new' Silver Wing owner and within a few days of ownership and with limited experience of it's  strengths to have such a comprehensive shopping list.

So,hows life with you grumph hole?

Whats it like going back down to a 300cc scooter these days?

john grinsel wrote:

Does not matter what you do, you end up with scooter.....probably not as good as Honda designed it.

Honda did a sh!t job on many of the silverwing parts.
Exhaust ports and the headers being 1 fook up.
They dont even line up ffs,and the shabbiness of the header design and internal blockages is unreal.
Mass production doesnt always mean good quality or performamce.