scotinexcile
New member
Wanted to get a feel for how many racers would PERMANENTLY cripple your 600 to compete in a 450SB class 
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Would you permanently cripple your 600 to ride in 1 class
- Thread starter scotinexcile
- Start date
hitman5532
The Anti-Squid
I guess it would depend on what we are talking about. Would it render the engine block impossible to sell as a 600cc later in life?
LongGoneJohn
Gone
No. Its entirely reversible.
abhijitz
Radiuz
I am thinking of one & voted Yes, Reason :
1. Stepping stone to higher classes. (Disadvantage : only 1 class to race)
2. Ease to switch back & forth (600-450-600)
1. Stepping stone to higher classes. (Disadvantage : only 1 class to race)
2. Ease to switch back & forth (600-450-600)
synfinatic
Wannabe Fast Guy
If I was looking to race 450SB, seems like converting a 600 to a 450 is a pretty cost-effective solution. Not sure I would convert my GSXR 600 street bike to a 450, but I'd totally buy a salvaged bike and convert it.
And as Antarius said, it's totally reversible so if you want to move up and race 600's you can.
And as Antarius said, it's totally reversible so if you want to move up and race 600's you can.
hitman5532
The Anti-Squid
Ok, so what is the modification? Pull a spark plug?
duh_ave
Active member
Alan.
the bike Lohmeyer is on makes 70 rwhp on U4. 68 on pump. The bike Lilleland is on makes 62 or 63 on pump. Both bikes are still carrying the weight of a 600 (about 400#) and have 31 ft lb of torque. Both have stock engines with stock degreed cams, Leo Vince exhaust and a PCIII. Thats it.
There are MANY other bikes legal in the class putting out the same, and, definitely more power, in 450 (all at a substantially larger expense).
The bikes cost, including buying, is about $3500 ready to race. You can get on Craigs list and get parts. Modern chassis. Fuel injection. Nothing special, plug n play, affordable, competitive, reliable.
And as was mentioned, the mod is 100% reversible.
The ideas are:
1-- to introduce a bike that is both affordable and attainable to the average person, in order to put bikes on the grid in 450 SB (should it become legal, as the formula built sv500 already is) (FYI, Dorsey's 550 has same HP, more torque and weighs 270#).
2-- to make 450 the stepping stone class it should be, as well as entry level possible (the grey market bikes are hard to deal with), and also to make 450SB a good class to move laterally to.
Whats not to like?
The bike is currently legal in CL LW, F40 LW, and F4
the bike Lohmeyer is on makes 70 rwhp on U4. 68 on pump. The bike Lilleland is on makes 62 or 63 on pump. Both bikes are still carrying the weight of a 600 (about 400#) and have 31 ft lb of torque. Both have stock engines with stock degreed cams, Leo Vince exhaust and a PCIII. Thats it.
There are MANY other bikes legal in the class putting out the same, and, definitely more power, in 450 (all at a substantially larger expense).
The bikes cost, including buying, is about $3500 ready to race. You can get on Craigs list and get parts. Modern chassis. Fuel injection. Nothing special, plug n play, affordable, competitive, reliable.
And as was mentioned, the mod is 100% reversible.
The ideas are:
1-- to introduce a bike that is both affordable and attainable to the average person, in order to put bikes on the grid in 450 SB (should it become legal, as the formula built sv500 already is) (FYI, Dorsey's 550 has same HP, more torque and weighs 270#).
2-- to make 450 the stepping stone class it should be, as well as entry level possible (the grey market bikes are hard to deal with), and also to make 450SB a good class to move laterally to.
Whats not to like?
The bike is currently legal in CL LW, F40 LW, and F4
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duh_ave
Active member
no, more involved than just that, but its overall pretty basic:
1-- remove all 4 valves from a cylinder
2-- plug valve guides so they wont leak oil (some peeps are using silicon)
3-- disconnect fuel injector (unplug)
4-- put a plug in the exhaust header of the dead cyl down at the collector
theres a few tuning tricks and specifics we learned this year (all of ours are '04 - '05 gsxr's) I'd be happy to share with anyone actually going to build one.
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duh_ave
Active member
generally, most 450's are older 400's punched out to 450's, so many can run in super dino, 450sb, f4
other classes are CL LW, and F40 LW
afmotorsports
New member
"PERMANENTLY cripple your 600"? Isn't that a little dramatic? Sounds like you're referring to the 450 triples that Dave Wallis, Mike Lohmeyer, Dave Moss and others have been developing. All they do is take a cheap, outdated 600 racebike, execute a completely reversible engine modification for barely over a grand and out comes a bitchin 450 triple with an awesome frame, forks, wheels, etc. that should be legal for 450 Superbike and Formula 4. It's basically a modern 600 with some serious traction control (since one of the four cylinders is knocked out). It would be a perfect entry level racebike, exponentially better than some of the other small displacement bikes that come with horrible frames, wooden brakes and flexy flyer forks.
If I was ever going to come out of retirement, the 450 triples would be at the top of my list.
If I was ever going to come out of retirement, the 450 triples would be at the top of my list.
Well, somebody has to stir shit
Why not take brand new 600 and do it so you make more power?
btw. If it was up to me 450 class would go away and be replaced with something in size that is actually made by factories, like new ninja 300 or whatever may come out. Same with 500 twins. Or like I said it many times before, make class to catch all between 250 and 600.
duh_ave
Active member
Well, somebody has to stir shit
cuz nobody will give us one! The idea of a budget bike is always appealing, but sooner later, ya, someone will show up with some thing newer, bigger, and betterCode:Why not take brand new 600 and do it so you make more power?
something similar is being talked about, I think you may have discussed it a bit already. Its on the rules proposals list, not as a proposal, but just to start conversation around the idea
scotinexcile
New member
"PERMANENTLY cripple your 600"? Isn't that a little dramatic? Sounds like you're referring to the 450 triples that Dave Wallis, Mike Lohmeyer, Dave Moss and others have been developing. All they do is take a cheap, outdated 600 racebike, execute a completely reversible engine modification for barely over a grand and out comes a bitchin 450 triple with an awesome frame, forks, wheels, etc. that should be legal for 450 Superbike and Formula 4. It's basically a modern 600 with some serious traction control (since one of the four cylinders is knocked out). It would be a perfect entry level racebike, exponentially better than some of the other small displacement bikes that come with horrible frames, wooden brakes and flexy flyer forks.
If I was ever going to come out of retirement, the 450 triples would be at the top of my list.
The wording in the proposed rule change, and I quote "4th Cylinder must be permanently disabled." Permanently means not being able to change it back right? or is there another meaning to the word?
scotinexcile
New member
How can it be reversible when the proposed rule says "4th Cylinder must be permanently disabled."?
synfinatic
Wannabe Fast Guy
Ah, didn't realize your objection was that people had to pour concrete into one of the cylinder bores! Good catch!
scotinexcile
New member
You cant switch back and forth with the same bike read the proposed rule "4th Cylinder must be permanently disabled." So you can run only 1 class with the bike 450SB
machete
black out
and Formula IV, clubman lightweight, and F40 lightweight, yes?