staintune exhast pipe less restrictive?

[rollinghelmet]

I brought my fj 1200 88 with staintune exhaust pipe slipons, made in Australia, very nice stainless steel

I would like to know if they are less restrictive than the standard exhaust pipe

I have just installed rpm unipods and can tell it needs allot more fuel and I am about to order some pilots and mains and raise needle

Can i get some recommendations on pilot and main sizes

I was thinking of 40 pilots and 122 mains

I also brought a Barnett Pressure Plate Conversion kit from RPM and I am very happy with it, very progressive and light action and no slipping yet

[movenon]

Your combo sounds about right but I would PM or e mail Randy at RPM he can zero you in. Nice bike ! Ask about adjustable needles if yours are not. Seems most of run at the 4th clip down from the top.
George

[Arnie]

RollingHelmet said, "I was thinking of 40 pilots and 122 mains"

I think those mains will be too big.
I've got Pipeline slip-ons, and Uni Dual-pod filters and am happy with 115s and needle on center groove.
I'd doubt you'd need any fatter than 117.5 mains.

[oldktmdude]

  I'm running a V&H 4 into 1, Uni Dual pods, 4* timing advance 42.5 pilots and 117.5 mains. From memory needle clip is in 4th position down from top. Sorry I can't remember exact idle mixture screw settings but it's around 3 turns out.
  All the above relates to an engine fitted with a 1219cc Wiseco  Big Bore kit 10.5:1 comp ratio. Runs very crisp and relatively good on fuel consumption.   Regards, Pete.
 

[movenon]

  I'm running a V&H 4 into 1, Uni Dual pods, 4* timing advance 42.5 pilots and 117.5 mains. From memory needle clip is in 4th position down from top. Sorry I can't remember exact idle mixture screw settings but it's around 3 turns out.
  All the above relates to an engine fitted with a 1219cc Wiseco  Big Bore kit 10.5:1 comp ratio. Runs very crisp and relatively good on fuel consumption.   Regards, Pete.
 

Did you do the 1219 kit yourself Pete ?  Sooner or later I am to have to do my top end. Running through the options.
George

[oldktmdude]

Did you do the 1219 kit yourself Pete ?  Sooner or later I am to have to do my top end. Running through the options.
George

George, yes I did all the work myself with the exception of the re-boring and honing. Very happy with the results, so far done approx 50,000 kms
(31,000 miles). A noticeable increase in performance and a relatively cheap rebuild.  Regards, Pete.

[rollinghelmet]

Did some more research and i believe that the 3cw model is the uk specification so i have 42.5 pilots is that correct ?

Bought these on ebay 117.5 mains
http://www.ebay.com.au/itm/380995231475?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

will try needle clip in 4th position

Thank for the help

[racerrad8]

Did some more research and i believe that the 3cw model is the uk specification so i have 42.5 pilots is that correct ?

Bought these on ebay 117.5 mains
http://www.ebay.com.au/itm/380995231475?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

I hope those are the right main jets, as they are listed as small round head, the picture shows large...

That is what I buy here in the US as small.


The FJ requires "large" head jets


Now, as far as the pilot jetting size is concerned, there are questions requiring information regarding weather conditions, altitude, sport or tour riding, single or two up.

Then you need to check and see what air bleed jet you are running as well.

Randy - RPM

[movenon]

Did you do the 1219 kit yourself Pete ?  Sooner or later I am to have to do my top end. Running through the options.
George

George, yes I did all the work myself with the exception of the re-boring and honing. Very happy with the results, so far done approx 50,000 kms
(31,000 miles). A noticeable increase in performance and a relatively cheap rebuild.  Regards, Pete.

Thanks ! I will know more facts when I pull the top end and do some measuring and inspection. Still gathering information. I have seen those 1219 kits around but hadn't run across anyone that installed one. I had a question on the kit but I think it has been answered. No mods to the lower case. There are 50 over pistons available for the 1200 but I haven't compaired the cost yet. I hate to pull the top end, kind of a financial rabbit hole... 
George

[ribbert]

Did you do the 1219 kit yourself Pete ?  Sooner or later I am to have to do my top end. Running through the options.
George

George, yes I did all the work myself with the exception of the re-boring and honing. Very happy with the results, so far done approx 50,000 kms
(31,000 miles). A noticeable increase in performance and a relatively cheap rebuild.  Regards, Pete.

Thanks ! I will know more facts when I pull the top end and do some measuring and inspection. Still gathering information. I have seen those 1219 kits around but hadn't run across anyone that installed one. I had a question on the kit but I think it has been answered. No mods to the lower case. There are 50 over pistons available for the 1200 but I haven't compaired the cost yet. I hate to pull the top end, kind of a financial rabbit hole...  
George

George, the 1219 kit cost a total of about $1300 for the kit, boring, a couple of oil changes and filters etc. probably less in the US.
The pistons from memory each weighed 22 grams less than standard and I fitted adjustable cam sprockets to return the timing exactly to spec.

If doing it again ( which I am) I would definitely get a base gasket from another source and not use the one in the kit. Mine failed at 60,000 km. I'm talking leaking, not weeping. Oil on your boot leaking.

As Pete says, there is a some improvement in performance but not significant. You would not do this for the performance gains alone, it is after all only another 31cc.

I always a attributed the improved performance to the motor being fresh, 165 across all cylinders, the cam timing being spot on, the valve clearances adjusted and the lighter pistons. Not just increased displacement.

Just a point of interest, one piston was slightly smaller than the others and one cylinder bored accordingly. The machine shop has extensive experience with Wiseco and always measure the pistons for just this reason.

Noel

[movenon]

Thank you for the in site and information Noel.  I am not looking for the the last bit of HP just some more snap and a clean running engine.  My compression across the board is 120 PSI plus or minus a few lbs. Low but even.  At this point I am just thinking out load and gathering information before I tear it down.
To much good information out there not to be listening.

On the gaskets I would probably get them from RPM. I plan on pulling the top end off next month or as soon as it gets to cold to ride much. Right now plan A is to hone and replace the rings, plan B to go with 50 over pistons, plan C go the 1219 route,  Plan D buy a donor bike with a good engine.   

Right now we are in a sweet spot for riding weather. Just about perfect. Plan on going out with the local vintage club this week end. But the days are numbered.
soon sending all the good weather down your way. 
George

[krusty]

I brought my fj 1200 88 with staintune exhaust pipe slipons, made in Australia, very nice stainless steel

I would like to know if they are less restrictive than the standard exhaust pipe

To quote Staintune's description in their 1996/97 price list;
"Sports Touring and Touring Mufflers & Full Systems (Mechanical Baffle Design) These are designed to improve the Performance, Exhaust Sound & Appearance of the Motorcycle yet still not exceed RTA Sationary noise test requirements"

This would suggest they are less restrictive than original equipment.

[ribbert]

I brought my fj 1200 88 with staintune exhaust pipe slipons, made in Australia, very nice stainless steel

I would like to know if they are less restrictive than the standard exhaust pipe

To quote Staintune's description in their 1996/97 price list;
"Sports Touring and Touring Mufflers & Full Systems (Mechanical Baffle Design) These are designed to improve the Performance, Exhaust Sound & Appearance of the Motorcycle yet still not exceed RTA Sationary noise test requirements"

This would suggest they are less restrictive than original equipment.

Yes, they are less restrictive and they were very popular at the time as a performance upgrade despite costing a fortune, mine came with them fitted and the receipt was still in the handbook from '95, $1400 back then!
I have the early ones, below, and removed them entirely because they were too quiet. The later ones had removeable baffles. You're right, they are beautifully made and the SS thick.



Noel

[racerrad8]

Yes, they are less restrictive and they were very popular at the time as a performance upgrade despite costing a fortune, mine came with them fitted and the receipt was still in the handbook from '95, $1400 back then!

Noel

That means the new RPM Stainless Steel Exhaust System is even a bigger bargain when compared to the '95 price.

Randy - RPM