08-07-2012, 04:38 PM #1
Need some help on mods between different classes
Can anyone help me understand what mods are allowed in each class specifically for 4 stroke N/A runabouts?
Like for example:
Stock = aftermarket prop, aftermarket grate, aftermarket ECU, aftermarket K&N type air system
Limited = aftermarket exhaust
Open = everything else
I'm trying to figure out what class my Yamaha VXS would be as it stands today with the mods I have on it. I've looked at the ISJBA rulebook and still a little confused.
08-11-2012, 02:49 PM #2
- Join Date
- Jun 2012
Jarrett, what mods are on your VXS? Most likely it will fall under the Stock or Stock Lites class.
08-12-2012, 09:10 PM #3
DIY K&N type air intake
Stock ribbon filter removed from intake manifold
Riva SS intake grate
V-Tech Stage 1 Reflashed ECU
Removed stock spacers from ride plate
R&D Free Flow Exhaust
08-13-2012, 07:36 PM #4
- Join Date
- Jun 2012
Well i'd have to dig into the rule book and double sheck but with the exhaust and re-programmed ECU i'm pretty sure thats going to fall in the Limited category
08-13-2012, 11:35 PM #5
ECU is ok for Stock Class, exhaust mods are not. Exhaust (and pump) mods bump you to Limited Class.
Only sanctioned class (currently) in USA where VXRs can be competitive is the R/A N/A Class . This Class blends the N/A 2-strokes and the N/A 4-strokes.
In this class the 4-strokes (again, this is USA) must run by stock class rules.
The 2-strokes are allowed to run by limited class rules.
This actually (imo) makes a fairly level playing field, and still gives the 2-strokes a place to race (the old "classic" 2-stroke classes are being eliminated). It also gives ppl with the newer less expensive N/A 4-strokes (VXR, GTI etc) a place to race more economically than most of the forced induction classes.
08-16-2012, 07:34 AM #6
Thanks for the info. It takes about 30 minutes to put the stock exhaust back on if that's the only thing that is keeping it from one class or another. Especially since it adds no performance whatsoever.
08-16-2012, 02:18 PM #7
08-16-2012, 05:46 PM #8
Did not relocate. Same exit port. I'm wondering if it matters because looking at the R5 and Outlaw sites and it looks like mostly Limited stuff.
"HOT" Classes Meaning these are the classes that have been fairly popular for the past couple of years those eligible to run these classes are Novice, Amatuer & Expert card holders.
Beginner R/A Limited
Optional Classes meaning these are the classes that must have 3 or more racers for the class to make. These classes as of right now WILL NOT be listed on the entry form.
Runabout N/A Stk
Runabout N/A Limited
Outlaw has these:
Beginner Runabout Modified
Amateur Runabout 1300/4-Stroke NA Stock
Amateur Runabout 1300/4-Stroke NA Modified
08-16-2012, 05:59 PM #9
Looking at the rules for stock, I see Two Stroke exhaust mentioned, but not Four Stroke. I'm thinking she might be able to run in the Stock classes?
08-17-2012, 03:00 AM #10
Email Scott Frazier at firstname.lastname@example.org or email@example.com to get the "OFFICIAL" ruling on your question as that is the only thing that is accepted is clarification from the IJSBA and an official ruling. Anything on a website unless its the IJSBA website or stated from the IJSBA is deemed unofficial.
I am pretty sure the freeflow exhaust is not allowed in stock class racing whether its N/A or just regular stock class. Ill double check but your best bet is to contact Scott.
If you dont get a response in a timely manner let me know and Ill see if I can help you. Hope to see you at the final round in Baytown, TX Sept 1-2nd
Check out www.r5waterxracing.com for more info or call us at 214-498-3592
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