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Author Topic: 38mm carb on 1987 big reed motor issues....HELP please- thanks  (Read 506 times)

Offline Rem28ga

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So I'm trying to run a 38mm carb on my motor. I have the correct zilla intake and boot for doing so. I need to come up with a way to adapt this to my airbox or eliminate the airbox completely. I had the adapter ordered, but that kind of went sideways, so on to plan B. Not sure what plan B is yet. Ideas anyone? This is the last big hurdle to getting this bike out on the sand. My motor has a bit of orting and head work, so I would like to capitalize on it with more fuel. I know others are running a 38 mm carb on their 250's, so how are you fitting them up?? My bike is a 91. Thanks

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Offline LT250RWV

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It will fit in stock boot. There a tight fit
91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

Offline LTZ-450

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put stock boot in boiling water for a bit then fit over carb and let set for a bit and boot will stretch let cool down on carb.Thats how I do mine works great

Offline Rem28ga

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I'll give it a whirl. I was pretty bummed when the adapter wasn't going to be available. I want to retain the airbox if possible.  I was hoping to use the zilla boot just because of better air flow.

Offline B_Fuss

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My stock 250 boot is on a 39 pwk.  When can't get it on, I hit it with a hair drier to get the rubber hot and flexable

Offline Rainman56

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Like others said the stock boot will work.A bit of a pita to cram in.Should  also be able to use a RM 465 intake boot as well.Same bolt pattern just doesn, t have the "ears on the reed side.I can get a part number for ya if you need it as I have one around somewhere.
Can,t fix stupid.:)

Offline Rem28ga

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That would be great. I got it on, it is really tight. I'm thinking of having the 34mm carb  bored to 36.5. That way I could use all stock stuff and it wouldn't be so tight. I'm thinking the stock boot is pretty restrictive on the air for the 38 pj.
 I ended up breaking the choke off the pj trying to get all the boots tight. Very irritated about that screw- up! The bike did end up firing, but needs some attention. I'm thinking it's jetting, but this carb came off a trx250r that is similarly built so I figured it should be close. Now I'm not so sure.

Offline B_Fuss

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You could have the air horn machined down to fit the air boot better

Offline Yuzuha32

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I have a boot that will work. fits the 87 big reed motor and is straight. also have a custom aluminum airbox. let me know if you are interested. here is a pic of the airbox and the boot. airbox comes with uni filter

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