I am going to port my scram and would like to know the differences between the trail and race port. pro's and cons. hp differences. does premium gas run in a race ported engine? or race gas? does a race ported engine ride well in the trails ? slow trails? I ride the dunes all summer long while the trails are really dusty or closed do to fire danger. but the other 8 months of the year I love riding the trails snow, rain, mud, dirt its greeeaat!. please let me know your experience with porting.

 

On an automatic machine, the porting, pipe and clutching all has to be done to work together or else the power wont be there. A race port with a trail pipe or vice versa wont work good together. For all around riding a trail type pipe with a good trail port is the best. Expect 8-10 ponies out of a trail port job on the 400. Bubba

 

the pipe i have is the one that HSP uses on both trail and race porting I believe. and I have been asking what other guys are running for their clutching but only got like 4 responses. wit hno modquad, ncscram, bubba 297, etc. input. please give me some more opinions on clutching.I will order a couple different springs at once to get the right performance for me but I would like to know which ones are going to be close before I order. and will the same clutch setup work well for trail riding and racing around at the dunes? thanks for all the help..... BILL

 

As brief as I can be

Trail port - more usable power almost all through the powerband, for those who want more power in general, with still keeping a fairly wide powerband

Race port - maximum power at rated RPM, for people who ride wide open ALL the time. Often has big 'dead spot' in powerband, and power sometimes comes on & off like a lightswitch.


As Bubba said, be sure that the pipe, porting, and clutch mods all are working together.

Farmr

 

And to help add to Farmers post, a trail setup usually engages at or just above stock RPM levels and is easy to ride. A race setup usually engages the clutch at 4000 or more RPMs and is peaky and really only used as an aggressive style of riding. You really need to speak to Hotseat and find out where their pipe makes it's top power at (example at 6800 RPMs). Then you match the clutching to the pipe. A tail port job would not have to be re-clutched if it's matched correctly. I have a buddy in Texas that had the trail mod setup and went to a race pipe. We even changed the clutching for it. He found out that he didnt like it as much because the lower end power was not there as much anymore. Like I said before, the trail port setup is usually the best and it will make some good power. You can get 60 HP out of a trail modded 400 bike on pump gas. Bubba