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Steve
Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6855
Experience:  30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
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Just did a top end rebuild on an 07 firebolt xb9r. Went to

Customer Question

Just did a top end rebuild on an 07 firebolt xb9r. Went to first start it after assembly. It won't fire and small amount of smoke coming out of the exhaust manifold under the air box. Timing went back on all the same. What is the problem?
Submitted: 10 months ago.
Category: Motorcycle
Expert:  Steve replied 10 months ago.

if you saw smoke, you have an exhaust leak.

the appearance of smoke indicates you have fuel and spark.

your engine requires 3 things to star and run:

- spark

- fuel

- compression

you need to determine which of those you do NOT have.

let me know what you find.

Steve

Customer: replied 10 months ago.
Thank you buddy! I'm all over it. I'll let you know
Expert:  Steve replied 10 months ago.

let me know if you need more help.

if not, please leave a POSITIVE RATING.

thank you,

Steve

Expert:  Steve replied 10 months ago.

let me know if you need more help.

if not, please leave a POSITIVE RATING.

thank you,

Steve

Customer: replied 10 months ago.
Hey Steve. I checked my exhaust thoroughly. Everything is tight. Bike still won't start and small amount of smoke emits from the manifold under air box. Could it be a timing issue and Will checking the static timing possibly correct problem? Thanks Steve
Expert:  Steve replied 10 months ago.

a top end rebuild does not disrupt the timing.

- is there some reason you suspect a timing issue?

- the manifold under the air box is the intake manifold and throttle body. hat manifold must be air tight. of it is leaking, that is the cause of the no star and the smoke you see is from a lean mis-fire, caused by air bypassing the throttle body through leaky seals.

*if you tried to re-use the intake seals, this is your problem.

Steve

Customer: replied 10 months ago.
Well when I did the rebuild I went ahead and removed the gear case Cover to change gasket. I did the static timing yesterday. Bike still doesn't want to turn over however it is NOT smoking now when I try and start. TPS reset? Also I did not reuse intake seals.
Customer: replied 10 months ago.
Thank you so much for advice
Customer: replied 10 months ago.
Expert:  Steve replied 10 months ago.

I am going to opt out.

every time you answer the problem changes.

first, the starter works but the engine won't fire and you get smoke from the exhaust manifold.

then, you get smoke from the intake manifold.

now, you state the engine "doesn't want to turn over" which means the starter is not working.

when the engine doesn't want to turn over, it typically means a battery problem but can mean a starter problem.

maybe another expert on here can sort this all out.

best of luck.

Steve

Customer: replied 10 months ago.
Hey thanks Steve. Sorry for delay in response. I'll leave positive rating