Gs400 suzuki no spark at plugs - 1997 Suzuki RF 400 R

0.8mm

Iridium Spark plugs for SUZUKI APV - Auto Brake Parts

https://autobrakeparts.com.au > shop > spark-plugs > iri...
Engine Capacity: 1.6L · Cylinders: 4 · Engine Type / Code: G16A · Camshaft / Valve: SOHC · Gap Setting: 0.8mm.
A$42.95 · ‎In stock
Missing: 2017 ‎' Must include: 2017

Spark Plug Gap Chart - Brisk USA

https://www.briskusa.com > spark_plug_gap_spark_plu...
For reference, see our spark plug gap chart below, this chart converts metric measurements to standard. How to Change Spark Plugs - Spark plug Gap setting and ...
Missing: APV ‎' Must include: APV

SPARK PLUG CATALOG - DENSO Global

https://www.denso.com > plug > pdf > catalog_generic
PDF
This may cause the spark plug to crack internally or the gap to be narrowed, preventing it ... SUZUKI ?12 long-reach iridium plug. Iridium plug. ZXE20HR13.
396 pages

First check spatk plug is actually sparking by removing it from engine and reconnecting plug cap, then place metal part of plug against engine, with ignition on crank it over, if no spark try replacing plug first, if that fails check plug cap, lead, ignition coil and all the way back to the cdi unit

There are of course many possibilities as to what the noise could be. It is troubling that a mechanic listening to it could not make a better diagnoses other than piston slap. Early Suzuki four strokes often had some piston slap probably due to larger tolerances. This sound generally will go away or lesson as the pistons get warm and expand. With out being able to hear the noise , my best guess is pre-ignition. Start by doing a compression check, both cylinders should be over 110 PSI and with in PSI of each other. If compression checks out, install new spark plugs and more importantly new NGK spark plug caps (about $5 each). Next take off the carburetors, inspect the intake manifolds for cracks or separation (air leaks), clean remove the carburetor tops and inspect the vacuum diaphragms if damaged or pin holed replace them (about $152 each)(a used set may give you the needed parts for less), thoroughly clean and reinstall the carburetors. If the problem was just a lean condition on one cylinder this may bring the cycle back to its original glory. If the damage is deeper in the motor (crank) perhaps a donor cycle or engine would be the best option. Unfortunately, the only way most of these options will work is if you are willing to put in the sweat equity your self to save the labor rate.

Rubber plug well seal is not properly positioned...dont mess with anything..I know katana. Properly position rubber water seal. Replace old plug wires with dielectric grease to help water proof...its not anything major katana are bulletproof!

means u have a misfire on cylinder number 5. whens the last time u changed ur spark plugs?

You can use NGK BP 7ES spark plug which I'm using for my ind suzuki 1985 dec bike

sounds like you may have to rebuild your carbs. This could mean just removing the carbs, removing the float bowls and cleaning out the jets and float valves. It may however require the purchase of a rebuild kit if the float valves leak. be sure to jot down the number of turns to any adjusting screws for mixture and such so that you may return to stock adjustment when you are done rebuilding the carbs. don't forget to check for proper ignition of spark plugs. make sure choke is not sticking in the closed position.

http://www.cmsnl.com/suzuki-gs400-x-1977-usa_model16010/partslist/

First GS400(X) was introduced in October 1976. The above link is the sectionised exploded views for the complete bike! The header of the page will direct you back to GS400 to see all the other 400 models. Cheers.

yep

IT PROBALY HAS POJNTS ON THE R/S OF THE ENGINE IN THE MAGNETO OR CHARGER. PLEASE RATE MY RESPONSE