engine swap suzushee 350cc

suzushee 350 · 11-27-2013, 02:27 PM

Hello all going to try this again. Figured I would share with you guys and gals my gz250 engine swap. This banshee motor puts out 48whp double the power of the stock motor. This may be the only gz250 with a engine swap on the web. This was a long process and time consuming but it has payed off with tons of power and fun for the city streets hear in florida. As you can see the gz is water cooled now for the banshee motor. Also the whole front frame had to be customized to fit banshee motor. Still have some gear tuning and tire size changing to do and wiring :biggrin: For the ones that don't know the banshee motor. Its a 2 stroke 2 cylinder 350cc 6 speed trans.

rebel son · 12-04-2013, 03:07 PM

hey ive got a question since your messing around the motor. ive got a 1999 gz 250 myself and i bought it used with only 6000 miles and since ive rode it ive noticed that i seem to run thru all the gears quick and i can only top out at 50 maybe 55 and thats really pushing it to the limit and i dont understand whats going on with it. i thot maybe it needs a tune up or timing needs to be reset or valves need to be really cleaned and reset but i honnestly dont know and im getting fustrated trying to figure out whats going on and how to fix it. so could you or anybody elts give me some ideas on this, it would really help. thanks

suzushee 350 · 12-07-2013, 01:16 AM

Quote:

Originally Posted by rebel son

hey ive got a question since your messing around the motor. ive got a 1999 gz 250 myself and i bought it used with only 6000 miles and since ive rode it ive noticed that i seem to run thru all the gears quick and i can only top out at 50 maybe 55 and thats really pushing it to the limit and i dont understand whats going on with it. i thot maybe it needs a tune up or timing needs to be reset or valves need to be really cleaned and reset but i honnestly dont know and im getting fustrated trying to figure out whats going on and how to fix it. so could you or anybody elts give me some ideas on this, it would really help. thanks

Just like goose said check the jetting or maybe a exhaust system and a re jetting on the carb.

Goose51683 · 12-04-2013, 03:14 PM

Rebel, These bikes are small bikes that when going uphill or against the wind can top out around 55. If your looking for a little more power or top end you can search for threads on here relating to "power improvement" and "jetting". There is a ton a great information here and many of these kind of questions have been discussed in great detail. You might also look up "16T gear", I know that's another hotly debated modification discussed on the forum. If you have any questions that you don't see feel free to start a thread and we will all work to answer any questions you may have.

Goose51683 · 12-04-2013, 03:16 PM

Suzushee-

Love what your doing here. I can't wait to see your pictures and hear how she rides and what issues you may run into. If things go well I might have to take a better look into this kind of project. Love my little 250 but a little more power would be nice.

suzushee 350 · 12-07-2013, 01:25 AM

Quote:

Originally Posted by Goose51683

Suzushee-

Love what your doing here. I can't wait to see your pictures and hear how she rides and what issues you may run into. If things go well I might have to take a better look into this kind of project. Love my little 250 but a little more power would be nice.

Thanks.. I actually already test drove it with the 2 into 1 exhaust and it killed my top end hp and overall peak hp by at least 10 to 15hp. it also had a top speed of 65mph but man did it get there fast. When I had this motor in my banshee with the pro circuit exhaust it was dual exspansion chambers and dual mufflers. I took 1 pro circuit pipe and ran a 2 into 1 pipe. My old jetting was 350 mains on both carbs when I went to test drive the bike it would not rev threw the rpms like it use to, it almost didn't even rev up because it was so rich, when I put 220 mains she had lots of low to mid power but lost everything up on the top end. So now im redoing the exhaust and trying to fit dual pipes and mufflers, but the bike drives nice and straight and feels real sturdy with the extra power.

suzushee 350 · 12-07-2013, 01:27 AM

Also it has the stock 41 in the back and 13 on the front. So I wanted to go with a 15 front 39 back with a 150 90 15 tire and see where the top speed is with this setup. But being that the banshee motor has short gearing inside the trans and now its only spinning 1 tire I guess this will just be trial and error lol.

Goose51683 · 12-09-2013, 08:28 AM

Sounds like a fun project. Can't wait to see how it turns out when you get it all figured out.

You still in riding weather down there?

suzushee 350 · 12-11-2013, 03:20 PM

Quote:

Originally Posted by Goose51683

Sounds like a fun project. Can't wait to see how it turns out when you get it all figured out.

You still in riding weather down there?

Yup its like 75 out during the day. Yea im hopin to be done with it around the beginning of next year. When I finish the dual exhaust I will post vids of it running down the street. But it will deff be a head turner when she is smoking at the light lol

suzushee 350 · 01-02-2014, 02:23 PM

I got the dual exhaust all finished up just have to load all the pics and vid. I also ordered the 16t front for the banshee motor. I wanted to know where you guys found that 39t rear sprocket im not having to much luck finding one. Also just an update the dual exhaust made the bike so much faster.

11-27-2013, 02:27 PM	#1
suzushee 350 Member Join Date: Nov 2013 Location: Florida Posts: 41	engine swap suzushee 350cc Hello all going to try this again. Figured I would share with you guys and gals my gz250 engine swap. This banshee motor puts out 48whp double the power of the stock motor. This may be the only gz250 with a engine swap on the web. This was a long process and time consuming but it has payed off with tons of power and fun for the city streets hear in florida. As you can see the gz is water cooled now for the banshee motor. Also the whole front frame had to be customized to fit banshee motor. Still have some gear tuning and tire size changing to do and wiring :biggrin: For the ones that don't know the banshee motor. Its a 2 stroke 2 cylinder 350cc 6 speed trans. Login or Register to Remove Ads
	0

12-04-2013, 03:16 PM	#5
Goose51683 Senior Member Join Date: Apr 2013 Location: Indiana Posts: 621	Suzushee- Love what your doing here. I can't wait to see your pictures and hear how she rides and what issues you may run into. If things go well I might have to take a better look into this kind of project. Love my little 250 but a little more power would be nice. Login or Register to Remove Ads
	0

12-04-2013, 03:07 PM	#2
rebel son Junior Member Join Date: Dec 2013 Posts: 1	hey ive got a question since your messing around the motor. ive got a 1999 gz 250 myself and i bought it used with only 6000 miles and since ive rode it ive noticed that i seem to run thru all the gears quick and i can only top out at 50 maybe 55 and thats really pushing it to the limit and i dont understand whats going on with it. i thot maybe it needs a tune up or timing needs to be reset or valves need to be really cleaned and reset but i honnestly dont know and im getting fustrated trying to figure out whats going on and how to fix it. so could you or anybody elts give me some ideas on this, it would really help. thanks
	0

12-04-2013, 03:14 PM	#4
Goose51683 Senior Member Join Date: Apr 2013 Location: Indiana Posts: 621	Rebel, These bikes are small bikes that when going uphill or against the wind can top out around 55. If your looking for a little more power or top end you can search for threads on here relating to "power improvement" and "jetting". There is a ton a great information here and many of these kind of questions have been discussed in great detail. You might also look up "16T gear", I know that's another hotly debated modification discussed on the forum. If you have any questions that you don't see feel free to start a thread and we will all work to answer any questions you may have.
	0

12-07-2013, 01:27 AM	#7
suzushee 350 Member Join Date: Nov 2013 Location: Florida Posts: 41	Also it has the stock 41 in the back and 13 on the front. So I wanted to go with a 15 front 39 back with a 150 90 15 tire and see where the top speed is with this setup. But being that the banshee motor has short gearing inside the trans and now its only spinning 1 tire I guess this will just be trial and error lol.
	0

12-09-2013, 08:28 AM	#8
Goose51683 Senior Member Join Date: Apr 2013 Location: Indiana Posts: 621	Sounds like a fun project. Can't wait to see how it turns out when you get it all figured out. You still in riding weather down there?
	0

01-02-2014, 02:23 PM	#10
suzushee 350 Member Join Date: Nov 2013 Location: Florida Posts: 41	I got the dual exhaust all finished up just have to load all the pics and vid. I also ordered the 16t front for the banshee motor. I wanted to know where you guys found that 39t rear sprocket im not having to much luck finding one. Also just an update the dual exhaust made the bike so much faster.
	0