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I know the gain would be minaml at best, but still... has any body tried drilling or milling out the the exhaust valve for better exhaust flow? seems like a reasonable enough thought, so just wondered if any one had tried it. I know that the hass eliminator, or full exhaust would flow better. and Ive read post to remove the valve all together, but i would think that with the valve chamber empty  there would be a certain amount of turbulance that would still hinder flow. Thats what got me wondering on drilling out the valve a lil larger?

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

i have a spare header and valve if you would like to dink with it

its not somthing i would personally waste my time with but it could be done

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AIM: Onefast2m8
02 CBR 954RR
02 Jetta 1.8t
98 GTI

wow, yeah!! im interested. guess all i would need is the valve its self, anything more would be a bonus. but i would like to discuss the possibility more!!!

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

well hit me up with a reasonable offer

if you have AIM my name on there is onefast2m8

or e-mail me at Getphkd@sio.midco.net

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AIM: Onefast2m8
02 CBR 954RR
02 Jetta 1.8t
98 GTI

If you have access to a weld shop make your own HASS and get a custom map. The only problem with boring out the HVEX  would be that you still have a slightly smaller hole then the exhaust. At the end of the day you would have better flow but then would need to map your bike for this new flow. If you have access to a Dyno then I would take off the HVEx bring it to a muffler shop and see if they could make you a HASS look a like but they may charge you the same as a HASS would. I've seen your thread about the PC if you do any of this you need the PC first since if you do pin the HVEX you will have a huge bog from 4k and below. We've tried it on a few different bikes and it came down that it makes such a big difference that you have to mod the A/F to get it to run smooth.

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01 CBR929 Erion "Hers" Full High EXT Yosh TRS, SS Undertail, PCIIIusb, Custom Map, Flapper Mod, PAIR Mod, GPR, Polished rims, Frame Sliders, SS Brake Lines.
01 CBR929 RR "His" -1 Front +2 Back, Full High EXT Yosh TRS, SS Undertail, Intergrated Tail light Blinkers, PCIIIusb, Custom Map, Flapper Mod, PAIR Mod, GPR, Polished rims, Frame Sliders, Speedo Healer, SS Brake Lines, Ohlins Forks The Bikes
Protect your Melon...Wear a helmet!!

Thanks Nate! I just pulled my ex. valve out to night to get a look at it and relized how pointless modification to the stock valve would be. Its made realy well!! For what it does and how its made there is no real improving it. With the exception of reduced tubulance on top end (valve flow is strait through, but seems to have crossover port from top 2 to btm 2), Im not sure that a HASS will make that big a deal any way. Do you know the dyno # off hand for stock, then a pc3,then a HASS and map, and last a full ex.?

When my bike was Dynoed it toped at 129hp. The shop owner said it was in the normal range for a 929 with just a slip on and no mods.He told me that a full ARATA and pc3, and he would get me in the 140's, but that the full ARATA was 1100 bucks! then showed me the pull of a 929 the had just finished, 155hp at the tire!! also had extensive head work and new cams. I would like more power but not at that price! Incidently I work part time at a muffler shop, so i could do a HASS look a like at cost.

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

You bike with a slip on is at about the right number. 929 stock is 125 on a good pull so with the slip on and a very good pull you are looking at about 128. As you know Dyno numbers are always a bit off. As for the HASS lots of people report just about 8 HP. I know that my bike was 124 then we put my Yosh on it and its pulling about 139 with a custom map. Really though the max HP isn't really that big of a deal because it's at 10900 RPM's but I gained just about 5 - 9 through  the rest of the map that made a big difference. Pound for pound the Sato is the best exhaust it even beats out hte Arata which is a feat. Most 929s will get you about 140 without motor work, the most I've heard of a 929 producing was the high 140's and maybe a very low 150. You can buy drop in Erion cams but below 4k is just crap and friend has them and it sucks below 4k, his bike doesn't pull any harder then mine. Although the Dyno sheet says 145 but only at the very top so hard to ride that full time. But for the work required you could buy a new liter bike so isn't cost effective.

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01 CBR929 Erion "Hers" Full High EXT Yosh TRS, SS Undertail, PCIIIusb, Custom Map, Flapper Mod, PAIR Mod, GPR, Polished rims, Frame Sliders, SS Brake Lines.
01 CBR929 RR "His" -1 Front +2 Back, Full High EXT Yosh TRS, SS Undertail, Intergrated Tail light Blinkers, PCIIIusb, Custom Map, Flapper Mod, PAIR Mod, GPR, Polished rims, Frame Sliders, Speedo Healer, SS Brake Lines, Ohlins Forks The Bikes
Protect your Melon...Wear a helmet!!

Nate, im wanting more info on the dobeck unit , like experience from some one who has used one. It seems a little less refined than the power comander, but none the less should help performance over stock. and for a bit less money. Have you ever seen one in use?I tend to think that the sport bike crowd may have steered away from it  and to the P.C. since it is so good and every one wants that last little tidbit of performance.

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

so, are you intrested in my valve or not?

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AIM: Onefast2m8
02 CBR 954RR
02 Jetta 1.8t
98 GTI

OH! I forgot. Well as I said ,Ipulled out my valve andI dont see a possible way to modify it realy.so i dont see much point in that.  how about thecollector behind the valve(the whole thing all the way to the slip on flange realy) only option i see left would be to cut and lengthen the collector to remove the valve. let me now if you have that section and would be willing to get rid of it.

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

The collector isn't going to do much since really you restriction is at the valve. If I were you I would make a HASS and get a custom map and you will be way ahead on price. The tail piece with the holes are a baffle we believe some have cut it out and not noticed anything. I've never tried it but the theory is sound to me. Give it a try and see if you can feel it and let us know it will be interesting.

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01 CBR929 Erion "Hers" Full High EXT Yosh TRS, SS Undertail, PCIIIusb, Custom Map, Flapper Mod, PAIR Mod, GPR, Polished rims, Frame Sliders, SS Brake Lines.
01 CBR929 RR "His" -1 Front +2 Back, Full High EXT Yosh TRS, SS Undertail, Intergrated Tail light Blinkers, PCIIIusb, Custom Map, Flapper Mod, PAIR Mod, GPR, Polished rims, Frame Sliders, Speedo Healer, SS Brake Lines, Ohlins Forks The Bikes
Protect your Melon...Wear a helmet!!

Actualy Nate, i was thinking that if i could get my hands on a collector that I could cut it just behind the flange and lengthen it to meet the other flange on the header. And there by elimanate the valve.And the cone has been gone . sawzalled when i got the jardine, no noticeable difference. of course i dont have a pc3 either so...........

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

i only have the header and the valve

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AIM: Onefast2m8
02 CBR 954RR
02 Jetta 1.8t
98 GTI

That Sucks!! Incidently ive got 27000 on the odometer, and the bike sounds like a sewing machine at low rpm, i ve been told thats normal. any in put?? its not loud but distinctive.

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol