Wed Mar 5 08:56:29 1997 - Message No. 471
From: "Seaton, Andy"

Subject: FW: Shooting





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            Andy Seaton. PCSA X3473

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>----------
>From: 	Seaton, Andy
>Sent: 	Wednesday, March 05, 1997 7:44 AM
>To: 	'Martin Franz'
>Subject: 	RE: Shooting (XRV-LIST)
>
>Greetings Martin,
>
>re your @ blow back etc...
>
>If you have any bike running too thin or rich it is harmful whether it is a
>four stroke or two stroke. If you have your bike too lean (jets too small)
>then you run the risk of blowing up your engine, if you run it too rich (jets
>too large) then your engine will not run smoothly. The way too tell if your
>engine is too lean or rich is too do a plug chop. For this do the following:
>1. Find a good stretch of road.
>2. Get up too full speed.
>3. Once at top speed hit the kill switch and pull over.
>4. Take your plugs out and look at the tops. The colour should be a biscuit
>brown. If it is white then you are in danger of blowing up your engine as you
>are running it too lean. If they are black then you are running your mixture
>too rich.
>As for the blow back if you kick in your bike hard which you appear to be
>doing then this is a nornal reaction from the bike. Indeed some people do it
>on purpose all the time. If your bike is running ok under normal operation
>and you do the above (called a plug chop) then I don't think you have too
>much to worry about.
>
>Have fun....
>
>see ya...
>
>
>
>
>                       \\\\\\|/////
>                         (  @ @  )
>                          (    *     )
>                              ---    
>   ------------------oOOo----oOOo------------------
>
>            Andy Seaton. PCSA X3473
>
>                                       Oooo
>              oooO                 (    )
>               (    )         \--/     )   )
>               (   (                   (_/
>                \_)
>
>
>
>
>----------
>From: 	Martin Franz[SMTP:Martin_Franz@compuserve.com]
>Sent: 	Wednesday, March 05, 1997 7:32 AM
>To: 	andy.seaton@gs.com
>Subject: 	Shooting (XRV-LIST)
>
>Hi,
>since the winter pause of my bike, I realize now an anoying problem. As
>long as I drive civilized, the bike is normal. But if I go "wild" (specialy
>with 2 person on bike), the engine (or better the muffler) frequently
>"shoots". It only happens downhills, after going up to 8.000rpm and then
>shutting the throttle, 1 sec later: "BANG" (a real loud one !!!).
>Before, that happened only over 2000m seehigh (which, at least I,
>considered as normal), now even on small hills (<1000m). From other bikers,
>I got now answers ranging from "this is normal", "you kick your bike too
>hard", "the carbs are too fat, but this is better than too lean", ... not
>very helpfull.
>So, is this normal ?  Is it harmfull to my engine ?  ("too fat/too lean" I
>thought, that's only a real problem on two stroke engines with oil/gas
>mixture ???).
>
>have a nice slide, martin (BANG !)
>
>
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