What is this inside my barrel?!

All Engine, Clutch, Chains, and Sprockets Stuff Here.
Post Reply
User avatar
CAD
Posts: 7
Joined: September 15th, 2013, 4:22 am
Location: Perth, WA
Contact:

What is this inside my barrel?!

Post by CAD »

Just took my barrel into the machinist to get her cleaned up for a new top end and he spotted this.. Any idea what these little milled slots are just above the exhaust ports? I have not seen them on my other 2 strokes before... bike is a 91 CR500.

Cheers

Image
User avatar
other
Posts: 338
Joined: January 25th, 2010, 5:11 am
Location: Perth Hills, Western Australia

Post by other »

Decompression scallops to ease starting . . . standard on all CR5's, and most other non power-valve big-bore 2 strokes. Is that your barrel up at 360 S&C ? if so, dood, that needs some attention from a hone !
o.t.h.e.r . . . . .Over The Hill Enduro Rider
User avatar
CAD
Posts: 7
Joined: September 15th, 2013, 4:22 am
Location: Perth, WA
Contact:

Post by CAD »

other wrote:Decompression scallops to ease starting . . . standard on all CR5's, and most other non power-valve big-bore 2 strokes. Is that your barrel up at 360 S&C ? if so, dood, that needs some attention from a hone !
Sweet... thought so.

Yeh it was... picked it up today and wasn't super impressed with it :(
User avatar
mr500
Posts: 99
Joined: July 30th, 2010, 3:02 am
Location: Sydney Australia

Post by mr500 »

Hi mate
You might want to get them to chamfer the edges of the ports and to relieve the exhaust bridge while they are working on it.
Refer to the Honda cr500 manual.
If they don't... El Seizo :shock:
Keep it real, Keep it steel.
Post Reply