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1993 Honda XR 250 R Full Restoration
Another build coming along. I was wanting something more simple for extremely tight wooded single track. Low seat height, air cooled no radiators, smooth power, low maintenance and super reliable.I have had the YZ400 F, CRF 450s etc but I am really a two stroke guy so I am not so sure how this is going to work out.
Here is the old girl, she has been in storage for a long time. She turns over but won?t start. She has spark,fuel but the compression is too low,50 PSI per my gauge. So, I am going to start by pulling the head,cylinder for inspection, then send out head,cylinder to be bored for a new Wossner piston and all new Honda gaskets.I think the subframe and foot pegs are a little tweaked as well.Yikes, look at that stock silencer?. it?s as big as a boat anchor.
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2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300 "If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut." ―Comedian Lewis Black "I think best when I have a wrench in my hands." Soichiro Honda "Dreams are messages from the deep." -Unknown Sardaukar Last edited by Moto7man; 05-07-2022 at 01:02 PM. Reason: Add photos |
#2
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I do enjoy your restos. I might struggle with the subject matter having valves and cams, but will see the transformation as what it is I bet.
RM still looks great lurking in background.
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'07 EC300 GG '14 TXT250 GG '? 496 CPI Cheetah RZ/RGV hybrid '22 765 Street Triple RS '21 XTrainer '69 Stinger T125 Suzuki '23 TRS 250RR (it's a Trials thing) |
#3
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Thanks! I am struggling with the valves and cam stuff too.
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2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300 "If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut." ―Comedian Lewis Black "I think best when I have a wrench in my hands." Soichiro Honda "Dreams are messages from the deep." -Unknown Sardaukar |
#4
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Ok, I per her at TDC per the Honda Manual and removed the valve cover confirmed the timing marks on the cam sprocket were lined up. Here is a picture of the inside of the valve cover, everything looks good. She looks really clean inside, no metal, oil had drained out clean.
Here is the head at TDC, It?s very clean, I have to check the valve adjustment, .1 mm on intake and .12 on the exhaust.
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2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300 "If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut." ―Comedian Lewis Black "I think best when I have a wrench in my hands." Soichiro Honda "Dreams are messages from the deep." -Unknown Sardaukar |
#5
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I went ahead and removed the sprocket cam bolt, then rotated the crank 180 degrees and removed the other sprocket cam bolt, then removed the cam sprocket and the cam shaft and bearing noting that the sealed side of both bearings face outward.
Everything going along well and I removed the head bolts and head. The piston didn?t look too bad, it is a Honda KT1, but I don?t see an indication if it is a std, a .25 or a .50.
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2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300 "If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut." ―Comedian Lewis Black "I think best when I have a wrench in my hands." Soichiro Honda "Dreams are messages from the deep." -Unknown Sardaukar |
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Here is the piston,
Side shot of the cylinder, This is where we are so far, however I have a problem, I have removed all the head bolts without a problem, it is a mix of 12mm and 8mm but I cannot break the cylinder loose. Does any one have any ideas?
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2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300 "If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut." ―Comedian Lewis Black "I think best when I have a wrench in my hands." Soichiro Honda "Dreams are messages from the deep." -Unknown Sardaukar |
#7
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Double check all the bolts are out and if so a CAREFULLY place block of wood and a few taps with a hammer will break the gaskets hold. Those stock Honda gaskets get a good bite in over time on air cooled motors. But make sure you try to not hit the fins as they are extremely brittle.
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Back on a gassy! 2018 EC300! 🤘 Txt 280 07 to make me feel like a gumby again |
#8
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Extreme Violence.
Worst that can happen is that you will give the ghost of Soichrio a double hernia. And that prick kinda deserves it.
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'07 EC300 GG '14 TXT250 GG '? 496 CPI Cheetah RZ/RGV hybrid '22 765 Street Triple RS '21 XTrainer '69 Stinger T125 Suzuki '23 TRS 250RR (it's a Trials thing) |
#9
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LOL,maybe?
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2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300 "If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut." ―Comedian Lewis Black "I think best when I have a wrench in my hands." Soichiro Honda "Dreams are messages from the deep." -Unknown Sardaukar |
#10
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FYI
http://www.lt-racing.com/html/xr250r_s.html Les and I have been riding xr250s since 1987.... I would go with a J & E piston versus the wossner. Although a Honda oem 1985 xr250r piston 4th overbore is a good alternative ( if it is still available). Your other option is to pick up a sleeve and piston 80mm from thumper racing to go to 300cc. The cases will need to be split and bored to accept the larger sleeve. Best pipe back in the day was a white brothers magalloy. The stock pipe with the baffle removed has good power... For carb, I would stay away from from cheap kits that use 2 stroke carbs. Stock cam works best for woods. Jeff
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