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Forum: 1986 - 2007 Ninja 250R Tech Talk December 7th, 2023, 07:23 PM
Replies: 2
Views: 6,094
Posted By How2
Beg, Borrow, Steal - 42 & 43 rear sprocket

Hello

Does any one in the SF Bay area have one or both of these used sprockets I can try to see which one to settle in on?

The 15/45 is pretty useless both commute and tight technical twisty...
Forum: 1986 - 2007 Ninja 250R Tech Talk December 7th, 2023, 07:13 PM
Replies: 10
Views: 2,119
Posted By How2
overheating

Hello

There is one quirk that might be the culprit. The fan is actually coming on, but the bolt on the propeller is loose and its not spinning.

Or the prop is spinning, but not fast enough to...
Forum: 1986 - 2007 Ninja 250R Tech Talk November 22nd, 2023, 08:54 PM
Replies: 11
Views: 3,834
Posted By How2
Perspective - Lean

As I am in California, the stock jetting is too lean on the needle and pilot.
Adding a .3 - .5 mm shim will pull the needle up, which will richen the fuel mixure. That might be enough for a...
Forum: 1986 - 2007 Ninja 250R Tech Talk November 20th, 2023, 08:44 PM
Replies: 11
Views: 3,834
Posted By How2
Why oh why

Cause the jetting from the factory is for different fuel compositions and EPA compliance : not very functional

In the initial phase of tanking the carbs the bike ran asthmatically, along with that...
Forum: 1986 - 2007 Ninja 250R Tech Talk November 18th, 2023, 08:14 PM
Replies: 11
Views: 3,834
Posted By How2
I found the issue with the OEM carbs The OEM...

I found the issue with the OEM carbs

The OEM pilot jet is wrong , went up +1 size
The OEM slide needle is too lean- went with an after market vendor

The fuel/ air screw is too lean. Went 3...
Forum: 1986 - 2007 Ninja 250R Tech Talk November 11th, 2023, 07:51 PM
Replies: 11
Views: 3,834
Posted By How2
Ebay carbs / 11/23 purchase review

Got one of these from a vendor with a 99% customer score.
https://www.ebay.com/itm/256268546904

Here is the current lowdown compared to a 2003 stock carb that has been sitting for decades and...
Forum: 1986 - 2007 Ninja 250R Tech Talk January 2nd, 2022, 01:58 PM
Replies: 380
Views: 15,180
Posted By How2
Hey Bob I will do the test ride when it...

Hey Bob

I will do the test ride when it warms up. Guess I am too cheap to send these little turds out! Its gotten personal now with those things!!

(And I am going to sell the bike in the...
Forum: 1986 - 2007 Ninja 250R Tech Talk January 2nd, 2022, 01:32 PM
Replies: 380
Views: 15,180
Posted By How2
A word about using air on carbs

If you use high pressure air on your carbs, be sure direct the blast from the smallest hole opening to the largest.

If you have a particle of crud in the passage way you can lodge it permanently...
Forum: 1986 - 2007 Ninja 250R Tech Talk January 2nd, 2022, 01:20 PM
Replies: 380
Views: 15,180
Posted By How2
Hi I re-tighten the exhaust headers as...

Hi


I re-tighten the exhaust headers as some bikes run lean with a leak at the exhaust valve
(early honda xls will do this) will suck air through a header/ seal gap. That did not solve this...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 6th, 2021, 05:50 PM
Replies: 380
Views: 15,180
Posted By How2
RPM HANGS AT 2K - when hot

Hi

I have a 2004 250R with 2,100 miles that sat for a long time in a garage. It is in near mint condition.

This is what I have done to date:

- sonic cleaned carbs (all parts / jets) 3x
-...
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