Dyno'ed the Elsinore mt250 - Page 3

JonW · 10-03-2012, 03:32 AM

Cool bikes, Ive had a few of them, I put up a page about my recent resto one on my website: My 1974 Honda MT250 with CR250 top end and Bassani pipe

FWIW, the 75 CR cylinder will not fit the crankcases of the MT, only the 73/74 top ends will...

Dirtstar1 · 10-04-2012, 07:03 PM

I'm having fun with the bike. Ill have to try the air box lid trick. As for the pipe. My stock pipe is perfect. I ordered a DG low pipe for Ricky racing around on the street. I did see your mt250 page. Is your bike up and running?

Ryan

Dirtstar1 · 10-05-2012, 07:51 PM

Today was the first day after work I had time to open up the eBay packages I got. I opened up the cr250 cylinder and it was wrong! Damn! Looks like its a 76. First thing I noticed is the exhaust faces left. That's no good. So I got the gaskets out next. Well see for your self. The guy is looking through his junk for something to exchange it with. If that doesn't work I'm in search of a cylinder again...

Foot dragger · 10-08-2012, 03:07 PM

Well Crap,thats no good. I wonder if some porting whiz could port the MT cylinder you have to CR specs or even better?
Could find the port specs online and practice porting by doing it yourself. We did so on some of my racebikes back in the day and it worked out fine. Its not that hard to do.

Dirtstar1 · 10-09-2012, 01:36 PM

Quote:

Originally Posted by Foot dragger

Well Crap,thats no good. I wonder if some porting whiz could port the MT cylinder you have to CR specs or even better?
Could find the port specs online and practice porting by doing it yourself. We did so on some of my racebikes back in the day and it worked out fine. Its not that hard to do.

According to some race guys, the mt cylinder is too small on the intake area. This is true. So they say you can never grind to the level of flow the cr cyl makes. I got a lead on one now. Besides, I'm saving the mt cylinder for a reed block conversion. Muah!

Dirtstar1 · 10-12-2012, 12:03 PM

The new cylinder got here. It's the right one for sure! Looks great! Where was this hiding nearly 40 years? Lol

Dirtstar1 · 10-13-2012, 07:48 PM

You know the old adage, "if you can start it you can ride it!" ? Well she can start it now... She stole my bike for most of the day!

Borrego Springs is a great place to ride a vintage bike. Mostly sand with smooth dirt roads to power slide around on. Also there is some cool stuff to see out there.

Dirtstar1 · 10-14-2012, 06:46 PM

Day two of Borrego springs we went up coyote canyon. Anza Borrego desert is one of the only Desert that has running water year round.

Most of the ride looked like this

The little bit of water in the desert and it crosses the road!

Dirtstar1 · 10-20-2012, 06:09 PM

So a crazy turn of events happened. My girl love my mt250 so much she got her own! Now that's funny!

It came with really cool spares. CR top end, bassani pipe, and has aluminum cr wheels on it!

Dirtstar1 · 10-21-2012, 06:27 PM

Off to ocotillo wells for a vintage day in the dirt. Gave my girls some 2 stroke pointers and she was power sliding in no time! This is her new favorite bike. She wants to sell the wr250x now! Lol

10-03-2012, 03:32 AM	#31
JonW Adventurer Joined: Apr 2009 Location: Sydney, Australia Oddometer: 97	Cool bikes, Ive had a few of them, I put up a page about my recent resto one on my website: My 1974 Honda MT250 with CR250 top end and Bassani pipe FWIW, the 75 CR cylinder will not fit the crankcases of the MT, only the 73/74 top ends will... __________________ My 2 stroke website with my restorations of Honda MT250 & MB5, Yamaha RD LC (421cc), RZ350 YPVS, XT500 Supermoto and others... Thanks to all who have supported the Omega PloProf book at DeskDivers.com - it's very much appreciated

10-08-2012, 03:07 PM	#34
Foot dragger beat up ex flat tracker Joined: Dec 2006 Location: chico,just below rag dump(nor-cal) Oddometer: 6,771	Well Crap,thats no good. I wonder if some porting whiz could port the MT cylinder you have to CR specs or even better? Could find the port specs online and practice porting by doing it yourself. We did so on some of my racebikes back in the day and it worked out fine. Its not that hard to do. __________________ 2003 DR 650.(1976 Montesa 250 Enduro-nice!) - - 1990 MASI TEAM-3V.- 1976 Motobecane, Super-Mirage.- Kona, HumuHumuNukuNukuApua'a. Single Speed ThRaShEr BiKe. 1968 360 Greeves challenger MXer. 1999 Triumph Trophy 1200. 2011 KTM530 EXC. 2012 KONA Hei Hei Deluxe (ongoing bike issues) -2009 KTM 200XC-W.

10-20-2012, 06:09 PM	#39
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	So a crazy turn of events happened. My girl love my mt250 so much she got her own! Now that's funny! It came with really cool spares. CR top end, bassani pipe, and has aluminum cr wheels on it! Dirtstar1 screwed with this post 10-20-2012 at 06:23 PM

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10-04-2012, 07:03 PM	#32
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	I'm having fun with the bike. Ill have to try the air box lid trick. As for the pipe. My stock pipe is perfect. I ordered a DG low pipe for Ricky racing around on the street. I did see your mt250 page. Is your bike up and running? Ryan

10-05-2012, 07:51 PM	#33
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	Today was the first day after work I had time to open up the eBay packages I got. I opened up the cr250 cylinder and it was wrong! Damn! Looks like its a 76. First thing I noticed is the exhaust faces left. That's no good. So I got the gaskets out next. Well see for your self. The guy is looking through his junk for something to exchange it with. If that doesn't work I'm in search of a cylinder again...

10-12-2012, 12:03 PM	#36
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	The new cylinder got here. It's the right one for sure! Looks great! Where was this hiding nearly 40 years? Lol

10-13-2012, 07:48 PM	#37
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	You know the old adage, "if you can start it you can ride it!" ? Well she can start it now... She stole my bike for most of the day! Borrego Springs is a great place to ride a vintage bike. Mostly sand with smooth dirt roads to power slide around on. Also there is some cool stuff to see out there.

10-14-2012, 06:46 PM	#38
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	Day two of Borrego springs we went up coyote canyon. Anza Borrego desert is one of the only Desert that has running water year round. Most of the ride looked like this The little bit of water in the desert and it crosses the road!

10-21-2012, 06:27 PM	#40
Dirtstar1 ^OP Human torpedo Joined: Dec 2010 Location: Almost mexico I.B. Oddometer: 102	Off to ocotillo wells for a vintage day in the dirt. Gave my girls some 2 stroke pointers and she was power sliding in no time! This is her new favorite bike. She wants to sell the wr250x now! Lol