PDA

View Full Version : ? on motor work?


ride300exrider
11-10-2003, 03:18 PM
trying to get more power from the 300ex motor
would their be a difference if i used a wisco.020 over and a port and polish with a race cam?
what do u guys think i should do
any help
i was thinking a 310 kit from hetrick racing but not sure if i want to spend the money
looking to not wast money:eek:
wish i had enought to get a full race 330 kit:(
anyhelp
thanks ed
wilkin250r
11-10-2003, 03:30 PM
I'd say you are better of getting a different brand of piston, like JE or Ross. Wiseco pistons don't always live up to their compression specs. Contact C&D Racing, they'll hook you up...
hondafox440
11-10-2003, 04:26 PM
Ah, the classic Wiseco piston debate.

I don't think you can judge the brand as a whole by one batch of "incorrect pistons". I swear by Wiseco.
ride300exrider
11-10-2003, 06:42 PM
so answer to the question would be it is a god choice or not? would i see a difference or do i need a 310 kit or bigger?
cals400ex
11-10-2003, 10:31 PM
i think that the compression is more important than the size of the bore. i only went 1mm bigger on my 400ex to make it a 406. however, i went from the stock 9.1:1 to 11:1 compression. i also put in a stage 2 cam. this made a huge difference. you should notice a nice difference with a high compression piston and cam, however you will be wanting more the day its broke in. :D you just get use to the power quick.
bradley300
11-10-2003, 11:51 PM
contact gt thunder, i was very pleased with his prices and service
Dunlap
11-11-2003, 06:48 AM
The Wiseco piston for the 300ex is to low from the top of the pin to the deck. You can use the 250x Wiseco piston that has 0.20 higher deck. It will give 12.5:1 but you can take 0.60 of the dome and bring it down to 11.5:1 which will run on pump gas. It also has deeper valve pockets so if you run 12.5:1 you can run alot bigger cam, but you will need race gas. You could get even more out of it with boring it 0.80 over using the 250x piston which would give you 13:1.
ride300exrider
11-11-2003, 06:47 PM
mickey dunlap what would i be looking to spend for a rebuild with a 250x pistion .080 and a race cam to fit with port and polish, i want it done right not just to get by. and is their anything else i would need to have done?
Dunlap
11-11-2003, 07:49 PM
It would cost $855. total if I built the motor here.You would also need to get rid of the rev- limiter.(I dont do this mod. anymore)
bone705
11-11-2003, 08:24 PM
when i was looking at getting a JE or Ross piston they told me those companys dont make normal piston sizes for the 300. they just make like the 330 piston.
ride300exrider
11-12-2003, 03:50 PM
what would i get for 855? what parts and labor included?
would i have to pay anything else besides shiping?
thanks
Dunlap
11-12-2003, 07:39 PM
That is for everything you asked about, with out shipping.
ride300exrider
11-12-2003, 07:43 PM
what type of cam would it be and what type of piston?
thanks
ride300exrider
11-12-2003, 07:46 PM
also is that the best setup? and would i need an oil cooler or anything else?
what do u think

what is the wait is i sent the motor out in a few days just saying i was to do that?
Dunlap
11-13-2003, 02:03 PM
We use a Wiseco piston and my cam to my specs depending on what compression ratio you run and what type of riding you are doing. This is the best kit you can put in it as far as boring it in only but the 330 kit is better by far. We are so busy all the time there is no way I can give a turn-around time on motors. Starting mid-December motors come in here so fast that there is no way to keep track of time or when they will go back out.