[riptrsxs]

Why are people using the EP3 pulleys??? Why is that necessary. First time swapper, I'm just trying to understand.

 

[humping_dragon]

ep3's idle pulley as the name implies, came of an ep3 k20a3 set up since it does not have a pump power steering set up like the rsx. most people used it since they do not utilize the power steering set up and opt for an oem set such as the ep3 idle pulley set up.

 

[riptrsxs]

gotcha. thanx for explaining that. I guess I would then in turn need to use an EP3 belt. Is that right?

 

[humping_dragon]

yup yup, or any correct size belt. i believe it's a 7 rib, 60.5 mm belt?

 

[riptrsxs]

thanx man! Isn't it just the idler pulley that needs to be replaced???

 

[RuffRhyno]

Here are the part numbers from Honda:

31190-PRA-000 idle pulley - $22.61
31175-PRA-000 idle pulley bracket - $39.96
31185-PCX-003 bearing cover - $5.14
90031-PRA-000 special flange bolt - $1.48

http://www.hondapartssource.com

and the belt size for this setup tends to be 50.5 inches long, 7 ribs. But your best bet is to take string and route it how the belt would sit, then use that length for the belt.