This will fit all of the following bikes
Reed cage from 1Dir Racing :: Honda ATC 250R 81-86
Honda ATC 250R 81-86 #16133
Fits: TRX 250R 86-89 | ATC 250R 81-86 | CR250/CR450/480R 78-01
| FL350 ODYSEE 85-87 | FL400 PILOT 89-91
Mounted in mock up, never ran. 1Dir sells em for 159.00

125.00 shipped

Here is a flow comparison from there website http://www.1dirracing.com/catalogs/prod ... ctid=16133

For those of you who don't recall that "exhilaration", here is an example of comparative Flow Bench testing for a 250cc;

G3 Power Gurve Reed Assembly 71.40 CFM
Boysen Rad Valve 250cc 64.68 CFM
Honda CR/TRX/ATC25OR 6-petal 54.60 CFM
FMF 250cc & Suzuki RM250 1987-89 6-petal 53.26 CFM
V-Force 53.00 CFM*
Pyramid 51.00 CFM*
Yamaha YZ250 1989 6 petal 50.40 CFM

(All tests were performed in house and *calculated at 10 inches of water pressure and room ambient temperatures, to best simulate atmospheric conditions).