B-Pipe or ProTec

RMBC Freeride

RMBC Freeride

Vintage
Site Supporter
Location
Pueblo, CO
I don't agree that the 62t/64x casting is more prone to crack... sorry sjetrider. if anything, its the opposite.. 61x are known to be weaker.

IMO, they are equally prone to cracking under the same conditions which can be any of the following:

HARMONICS/VIBRATION - THIS IS THE KILLER
Internal casting flaws
High compression
High RPM
Detonation (see high compression)
Dual carb butterflies out of sync (causes more vibration)
etc.
etc.
etc.

Heavy, hard mounted pipes actually dampen/dissipate some of the vibration due to their sheer mass (changes the resonant frequency). You dont hear of many cylinders cracking with the stock pipe? Yamaha knows whats up... ha ha

Just my .02
flame away!

wishihad, sorry bout the threadjack
 
FLY6584

FLY6584

Location
Clearwater, FL
wishihad said:
About time, I was waiting for you to chime in.

No can do! The same way you have to have you ski all clean and pretty.:poke: I have to to get a good deal on anything I buy or I won't do it. Regardless of what or how much is it. I even tried to talk the guy with the 01 SJ down. Can't help it.:grumpy:

Also, have a long list of sh%t I need to buy. Including your trailer!!!
Click to expand...

Yeah, but also realize the following about most used bpipes:

-Most used Bpipes run $400-500
-Most Headpipes have water screws that are locked up
-Most bpipes don't come with the coupler or large hose clamps
-All used bpipes don't come with the 2 gaskets you need


Now when you think about it yes you are paying $649 for a new bpipe which is $150 more than you are willing to pay for a used bpipe, but it comes with everything you need and will be BRAND NEW and shiny with non-locked up water screws. PLUS YOU ONLY HAVE TO WAIT 5-7 BUSINESS DAYS.:biggrin: If you are not on this site for a good part of the day good luck finding a deal on a used bpipe with the parts whores that are around here.

I like to say money where ever I can also, but $150 doesn't seem worth it to me to not have a bpipe and ride with a stock pipe while waiting for a used one to come along.

Now if you could find good used bpipes for around $300-$350 then I might have waited.

Just my opinion though.
 
sjetrider

sjetrider

615 Freeriders are addicted to T1 madness.
Location
in the 615 (Nashville)
Toby is right there, ask him how he feels about the ole 760 cylender, maybe a casting error, but I am convinced that the majority of the cylender cracks are not due to not running a girdle head, like you said "Yamaha knows whats up" no girdle head from them??? They may help, but not required unless like I said earlier you are running high compression and or radically ported. :biggrin: I know of 2 now 3 cracked 61x cylenders, all were running head mounted pipes and 2 were ported cylenders, one with a girdle head. :shrug:

RMBC Freeride said:
I don't agree that the 62t/64x casting is more prone to crack... sorry sjetrider. if anything, its the opposite.. 61x are known to be weaker.

IMO, they are equally prone to cracking under the same conditions which can be any of the following:

HARMONICS/VIBRATION - THIS IS THE KILLER
Internal casting flaws
High compression
High RPM
Detonation (see high compression)
Dual carb butterflies out of sync (causes more vibration)
etc.
etc.
etc.

Heavy, hard mounted pipes actually dampen/dissipate some of the vibration due to their sheer mass (changes the resonant frequency). You dont hear of many cylinders cracking with the stock pipe? Yamaha knows whats up... ha ha

Just my .02
flame away!

wishihad, sorry bout the threadjack
Click to expand...
 
wishihad

wishihad

X
Location
va
Going to Hi-Jack my own thread and ask about carb jetting.
My current plan is to go with a new B-pipe and have GroupK cut my stock head. What jets do I need to change too and what should the pop-off pressure be set too for a 01 SJ?
 
jetskiking

jetskiking

Im done sanding!!!
Location
Dallas Georgia
If you look in my build thread there is side by side porting comparison of the protec bigbore cylinder and stock 650. This little motor rocks and has plenty of bottom end grunt. I actually found I get a little more out of the hole on that motor with the coffmans sizzler than I did with the protec pipe. I also run that pipe without the mount that ties it to the manifold just like a b pipe. Its getting x cases now. I guess it will be a 701 cc 61x 6m6 hybrid. You can actually get alot of power out of those 6m6's if it done right for a ton less money. If you look on groupk's website you will find lots of good info on comparisons of the wake up kits on all the engines. Thier work is similar to protecs. B pipes the king but if you want to go budget then get the protec. I'm wth sjrider me or my crew rarely have problems with cracking cylinders on pump gas compression mild porting and non head mount pipes on any of the cylinders. Would I trade my superstock 6m6 for a limited or mildly ported 701? Not a chance. I can do pretty much anything in the surf or off of wakes anybody I ride with can(they are riding strokers) and if I'm doing it on a 6m6 just wait till my stroker gets built:sneaky: It will be like taking the doughnut off the baseball bat. Something JK probably realized like alot of surf and wave riders is that smooth even power delivery is more your friend in the surf than arm jerking pull your shoulder out of socket power so thats probably the reason behind the protec pipe.
 
RMBC Freeride

RMBC Freeride

Vintage
Site Supporter
Location
Pueblo, CO
sjetrider said:
Toby is right there, ask him how he feels about the ole 760 cylender, maybe a casting error, but I am convinced that the majority of the cylender cracks are not due to not running a girdle head, like you said "Yamaha knows whats up" no girdle head from them??? They may help, but not required unless like I said earlier you are running high compression and or radically ported. :biggrin: I know of 2 now 3 cracked 61x cylenders, all were running head mounted pipes and 2 were ported cylenders, one with a girdle head. :shrug:
Click to expand...

Toby & I discussed it last night over a few rustys.... I know where y'all are coming from, but Ive got two cracked 61x cylinders in my garage that came off boats with girdled heads! I say they cracked from years of high rpm, high compression, carbs out of sync, heavy porting and pure racing abuse. In all reality, Keiths 760 lasted a long time without a girdled head. Toby's, had quite a few hours on his too. Your 61x... is a freak of nature, I guess... or just happened to be a really good casting with no flaws? :dunno: Not everyone is so lucky bro....
 
RMBC Freeride

RMBC Freeride

Vintage
Site Supporter
Location
Pueblo, CO
wishihad said:
Going to Hi-Jack my own thread and ask about carb jetting.
My current plan is to go with a new B-pipe and have GroupK cut my stock head. What jets do I need to change too and what should the pop-off pressure be set too for a 01 SJ?
Click to expand...

Not knocking Group K's work... but why not give the head milling job to one of the companies that support and/or participate on this site??? They could probably give you the jetting specs you need too. just a suggestion.
 
E

EvanB85

Team Poseur
Location
Tacoma, WA, USA
Along with what RMBC said, Group K is well respected in the industry, but they are also know to be conservative. If you read through their stuff, they tend to stress reliability (which is a good thing) over performance.

Not knocking Group K, but get in touch LPW.
 
FLY6584

FLY6584

Location
Clearwater, FL
botizzle said:
Someone correct me if I am wrong, But I think if you get a "new" b-pipe, it comes with jets. I've never bought new so I am not sure.
Click to expand...

Sometimes they do. Sometimes they don't. The lady you order it from at Factory Pipe will tell you that they may be in there and they may not be in there so she can't promise they'll be in there.

If you buy it from guys like Art out at Jetworks he will sell it to you for what FP sells it for, but sometimes will give you free shipping and free jetting to give you a deal because he isn't "technically" allowed to sell them for less than what FP retails them for.
 
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