Thread: Carb. Jetting Help
01-19-2007, 09:02 AM #1
Carb. Jetting Help
i need help about a good setting for jets and needle & seats for a Gp1200r
if any of yours have a good setting please send me info.
80 mm sleeve
Trued & welded crankshaft
catalitic removal d plate
Riva power valves
low jets 110
high jets 135
needle and seats 1.5
in the carbs this is the last setting and i broke the engine in the first start
01-19-2007, 09:19 AM #2
What spring are you using with the needle and seat?
common settings for GPR carbs are
95 gram dull silver spring
if you go to the how to section there is a post on manuals and you can get the mikuni manual there.
01-19-2007, 10:50 AM #3
Since we don't know anything about your ski or it's mods, it's hard to say. But I can't image you ever needing 135 main jets.
01-21-2007, 04:25 PM #4
I agree, the 135 main is too large for a 1200. My 1200 is lowell ported and I'm using 115/130. Most 1200's use a 120 or 125 mainjet.
01-22-2007, 01:17 AM #5
whit the 135 look like you idrolock the engine '' lol ''
i use 155 and 160 but only on race skis
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By oldschool69 in forum Yamaha How To & FAQsReplies: 7Last Post: 08-19-2012, 02:49 PM
By Dstox in forum Polaris PWC PerformanceReplies: 2Last Post: 07-14-2012, 09:37 PM
By Alvin in forum 2-Stroke PerformanceReplies: 7Last Post: 05-01-2010, 12:39 PM
By Piranha Performance in forum 2-Stroke PerformanceReplies: 34Last Post: 04-23-2010, 07:38 AM
By xyzyx00 in forum Yamaha PWC Performance (2-stroke)Replies: 3Last Post: 08-29-2006, 05:57 PM