Sooo, just about finished my bike. '87 Savage, Changed the pipe, not straight through, but still lets the gas through a lot better, and changed the air filter, which lets the air in much better. As expected, all the classic signs of running lean. Hard to start, lots of back firing, poor throttle response, and running lots hotter than I would like. Standard Mikuni BS40SS (24B10).

Can anyone tell me what I need to change in the carb, ie main jet etc, and what the part numbers are for the next 1 / 2 jet sizes / upgrades needed?

Read through the tech section ,fuel&exhaust,go from there.

Ok, all I really wanted was the parts I needed to replace for a better fuel flow. I figured it was just the main jet needs replacing with a larger one. The pipe is a generic one bought off Ebay with some baffles inside, but pretty much free flowing.
I don't really get what is meant by the 'air passages'. The sleeve has been removed, the filter sits on the manifold.

cone filter& load muffler ,every newbie's dream!

Carb will come off at the weekend to check. I'm pretty sure the cone filter sits outside the manifold, but best to check eh! Also fitted a new Iridium plug, which seems to be helping a bit. On wards and upwards.

Eddie.lean motors run hotter, the bike is tuned lean stock,you have added a more open air filter and muffler both of which will make it run even leaner . You need to rejet , to larger sizes,but not knowing what muffler or filter maker you've choose you need a jet kit to try and find what works for you.

Here is the thread that details the cone filter issue:

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1347609265


Eddie Picasso wrote on 07/24/16 at 15:36:58:



I am not convinced this assumption is an accurate one.  The stock air filter system works pretty well for the stock amount of air that the stock engine can flow.  The Cone filter may not actually be any better than the stock system - and the CV carb seems to be a bit difficult to jet properly when the wrong cone filter is used.  Most folks install the cone filter for the "look" associated with the removal of the air box, sidecovers, etc.  Verslagen has a system that probably does flow better than the stock airbox - but a small cone at the carb inlet???????

I seem to remember the original airbox was clamped to the rear mudguard. Sadly the rear mudguard on this bike had the structural integrity of Weetabix. Also, the original silencer was akin to a culinder. So the changes were sort of made for me, plus I only did the bike for a bit of fun over the winter. However, I've seen quite a few LS650's with similer setups as mine, so quite surprised that it looks like I could be having fun with the fuel/air settings.