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The 2-Stroke Garage => Turning Wrenches => Topic started by: mavguy on December 14, 2021, 07:20:15 AM

Title: Jetting on LC RD hybrid
Post by: mavguy on December 14, 2021, 07:20:15 AM
I am running a 350LC top end , with a 5mm spacer on RD350 LC long rod bottom end with stock exhaust.

my question is what changes do I need to make for the timing which is 1.8 for RD and also I read somewhere that the 81 LC uses 200 main jets in stock form while the RD  jets on the the VM 28 are 140mm. Do in need to change the main jets then? Thx!
Title: Re: Jetting on LC RD hybrid
Post by: m in sc on December 14, 2021, 07:54:22 AM
what jet tubes and airfilters? that is what really matters
Title: Re: Jetting on LC RD hybrid
Post by: mavguy on December 14, 2021, 08:23:20 AM
Not sure about the jet tube but I think they are the stock size.The air filer is clamp on K&N on the Y boot.
Title: Re: Jetting on LC RD hybrid
Post by: m in sc on December 14, 2021, 10:24:04 AM
stock.. for an aircooled 350? LC 350? this stuff all matters. Before oyu go any further, you need to know what jet tube, carb body, needle etc thats in there. 

Title: Re: Jetting on LC RD hybrid
Post by: mavguy on December 14, 2021, 11:41:27 AM
Stock VM 28 specs for RD350.
Title: Re: Jetting on LC RD hybrid
Post by: m in sc on December 14, 2021, 12:08:01 PM
then you'll be in the 220-240 main jet range as a start.
Title: Re: Jetting on LC RD hybrid
Post by: mavguy on December 14, 2021, 12:51:40 PM
Right.thanks.what about the timing settings? Since I am using the RD400 con rods with a spacer underneath the cylinders.
Title: Re: Jetting on LC RD hybrid
Post by: m in sc on December 14, 2021, 01:09:06 PM
id aim for 22  degrees as a start.
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