02 CR250R pipe question

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9/1/2017 7:48 AM

I am in the process of fixing up an 02 CR250. I am getting ready to buy the pipe and plan to go with a PC pipe and either the 304 shorty or factory sound. Application is MX. Currently the engine will be stock although I may have PC port it and modify the head down the road. I plan to run C12 or an equivilant. Carb is a Keihin 38mm airstriker.

Back when I had my original 02 (before I jumped on the 4-stroke wagon) I had the pipe and full length factory sound. My question is this. Is there any advantage in going with an 03-04 pipe over the 02 specific one? I wasn't sure if those pipes were better or just changed to match updated porting. I know the 05-07 (I think) went to the different flange setup.

Also, is there anything to gain by going with the shorty other than more noise and likely more frequent re-packs? For reference I am a 40 yo just getting back into riding after 4 years off. I was a decent junior/backmarker intermediate when I stopped.

Thanks!

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9/2/2017 1:26 AM

I think the general idea is that the shorty may help bottom end and the full length more overrev/top end. I have the full length on my cr250 but haven't tried it with a shorty.

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9/2/2017 5:11 AM

I haven't read anywhere that can confidently say that there is significantly better power gains (or any gain for that matter) from running a shorter silencer. From a logic standpoint, given that there is no back pressure created by the silencer itself, the length shouldn't have much of an effect. I have a FMF shorty in a box somewhere but am running the stock full length silencer. It's still pretty loud too.

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9/2/2017 5:26 AM

Thanks for the replies. I tend to agree, I went ahead and ordered the standard silencer. Just wasn't sure if this specific bike benefitted from the shorty more than the standard differences between the two. I do remember another guy having the shorty and it was really loud.

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9/3/2017 10:42 AM
Edited Date/Time: 9/3/2017 10:56 AM

If you haven't purchased a pipe already I'd suggest looking into an HGS expansion pipe. They're suppose to be close in performance to a Doma. I'm running a Doma on an 03 CR2 & did some testing about 14 yrs back with different pipes. The PC pipe will enhance the mid-top at the sacrifice of some lowned vs. the oem pipe. The Doma enhanced the entire rpm range in comparison to the oem. With cyl & head mods it's more pronounced.
The 03-04 pipe is improved for better lowend response vs. the 02 pipe. They're also designed to work with the model yr cyl intended. That being said you can run an 03-04 pipe on the 02 cyl. as the 02-04 has a female outlet at the end of the pipe that goes on the exhaust flange. The 05-07 models will have a male end that goes into the cyl..

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Speak softly and carry a big stick.

9/3/2017 9:22 PM

If you still want a 2004 cr250 Pro Circuit pipe... I have a low hour used one hanging around here, I am pretty sure it has a small dent that all the cr250 pipes gets the first time you drop them. I will take pics if you want to check it out. $50 plus shipping from Pennsylvania.

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9/4/2017 6:09 AM

Ti wrote:

If you still want a 2004 cr250 Pro Circuit pipe... I have a low hour used one hanging around here, I am pretty sure it has a small dent that all the cr250 pipes gets the first time you drop them. I will take pics if you want to check it out. $50 plus shipping from Pennsylvania.

Post a photo Ti, interested .

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9/4/2017 6:21 AM

Thanks for the info, and Ti, thank you for the offer. Already have a PC on the way, so if Jkop wants it he's welcome to it.

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9/4/2017 6:23 AM

H4L, for next time I would be curious about the HGS. When I looked for HGS in the US all I seem to get are BUD pipes made by HGS to BUD's spec. Are they the same or does HGS have a US importer?

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9/4/2017 7:23 AM

omalley wrote:

H4L, for next time I would be curious about the HGS. When I looked for HGS in the US all I seem to get are BUD pipes made by HGS to BUD's spec. Are they the same or does HGS have a US importer?

omalley - As far as I know Bud racing is the US importer & think they're HGS specs with the Bud logo stamped on the pipe. I could be wrong, but you can contact them to confirm.
I picked up an HGS pipe for 06-07 CR2 models also owned & going to be trying it once riding season starts in Oct..

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Speak softly and carry a big stick.

9/5/2017 11:09 AM
Edited Date/Time: 9/7/2017 9:51 PM

JkopMx wrote:

Post a photo Ti, interested .

I will send you more pics when I get home. Whats your e-mail. My friend shot these for me. Loved the pipe... only used it to race with, maybe 3 race weekends. Made the motor stronger from bottom to top!! Those are all the dents, I still have that bike somewhere... I absolutely could not get that bike to turn left... nobody could. Bent frame???




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9/5/2017 11:16 AM

appreciate it , little bigger than expected .

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9/5/2017 11:44 AM

JkopMx wrote:

appreciate it , little bigger than expected .

No worries... the pipe is 100% definitely more for a racer than a restore build. Anyway I liked the Pro Circuit pipe more than the HGS pipe because I shift up instead of over rev the CR250s. The HGS pipes have tons of over rev, I just do not ride 250s like that. With the HGS pipe I was always waiting for the hit, like it was flat then a hit. With the Pro Circuit pipe the bike just was always pulling like an electric bike does.

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