making one bike from two - Page 5

rynr · 06-01-2012, 06:54 PM

summary (after 500 km (300 miles)):

With every kilometer it runs better (when GZ250 was bought there wasn't enough oil in engine - through accident GZ participate in - oil came to air filter when crashed bike was laying on side) - clutch, gearbox and "sound" are so much better than 500 km ago

Motul 300V is good oil. I recommend it for everyone. Mostly used in racing bikes and cars. Keeps engine clean.

Oil leaks from dust seal from left fork, but it's not a big deal. Seal replacing should stop leaking

Bike top speed and acceleration isn't worth comparing to 125. Transmittion has longer ratios. Bike runs faster than 125, driving is more delicate to acquire estabilished speed. No need to "juggle" transmition gears when accelerating or decerasing speed. I've got a feeling that 125 engine is to weak to provide comfortable driving on GZ bike.

But engine transplant - not worth doing

Except many differences in parts, GZ125 frame isn't quite the same as in GZ250

Water Warrior 2 · 06-01-2012, 08:27 PM

Does the 125 have the same number of teeth on both sprockets as the 250? Both bikes may have the same transmission but the 125 may have different sprockets to accommodate the smaller engine. That would make sense from a manufacturing cost factor.

rynr · 06-02-2012, 05:28 PM

Sprockets and chain are completly different. Both front sprockets have 15 teeth, but GZ125 has size 428 sprockets and chain and GZ250 has size 520 ones.

5th_bike · 06-02-2012, 09:50 PM

Quote:

Originally Posted by rynr

Seal replacing should stop leaking

There could be just some dirt between the seal and the stem, there was a post here today with it mentioned; here it is:

Quote:

Originally Posted by blaine

Here it is!! :cool:

PS your bike is beautiful, what a great job, please post a pic after the engine guard is mounted.

rynr · 06-03-2012, 03:59 AM

i'll try this, but my forks are 11 years old, maybe it's time to change the oil too and replace seal on the bottom before it starts leaking.

CMS · 06-05-2012, 07:56 AM

Bike looks great, Bravo !! Terry

**jonathan180iq** · 06-05-2012, 08:21 AM

Quote:

Originally Posted by rynr

i'll try this, but my forks are 11 years old, maybe it's time to change the oil too and replace seal on the bottom before it starts leaking.

You might as well, since you are diving right into everything else.
Keep up the excellent work and keep posting pictorial updates of your progress. This could be immensely helpful to others in the future.

rynr · 06-09-2012, 07:01 PM

I had an accident today, some idiot drove in front of me from minor road, from right side. Didn't have time or place to put motorbike to the ground (salvage) - just started handling. I'm quite okay - flipped on car mask and landed on legs. Bike needs new mudguard, little suspension straightening (loosing bolts put straight and tighten bolts) and at least headlamp ring...

Here are a few photos done before this, and 1 after.

Water Warrior 2 · 06-09-2012, 08:03 PM

Very glad to hear you have no injuries from the mishap. The bike is repairable or replaceable if need be. I would imagine the crash bars saved a lot of damage when the bike finally can to rest.

rynr · 06-10-2012, 10:39 AM

Well, crashbar didn't help because i rided straight into the front-left side of car, my front wheel stoped in car's slot between it's wheel and fender. That's why my fender is in many pieces. The bike stopped in the car and was in standing position, didn't fell on the ground.

06-01-2012, 06:54 PM	#41
rynr Member Join Date: Apr 2012 Location: Poland Posts: 75	Re: making one bike from two summary (after 500 km (300 miles)): With every kilometer it runs better (when GZ250 was bought there wasn't enough oil in engine - through accident GZ participate in - oil came to air filter when crashed bike was laying on side) - clutch, gearbox and "sound" are so much better than 500 km ago Motul 300V is good oil. I recommend it for everyone. Mostly used in racing bikes and cars. Keeps engine clean. Oil leaks from dust seal from left fork, but it's not a big deal. Seal replacing should stop leaking Bike top speed and acceleration isn't worth comparing to 125. Transmittion has longer ratios. Bike runs faster than 125, driving is more delicate to acquire estabilished speed. No need to "juggle" transmition gears when accelerating or decerasing speed. I've got a feeling that 125 engine is to weak to provide comfortable driving on GZ bike. But engine transplant - not worth doing Except many differences in parts, GZ125 frame isn't quite the same as in GZ250 Login or Register to Remove Ads
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06-01-2012, 08:27 PM	#42
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: making one bike from two Does the 125 have the same number of teeth on both sprockets as the 250? Both bikes may have the same transmission but the 125 may have different sprockets to accommodate the smaller engine. That would make sense from a manufacturing cost factor.
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06-02-2012, 05:28 PM	#43
rynr Member Join Date: Apr 2012 Location: Poland Posts: 75	Re: making one bike from two Sprockets and chain are completly different. Both front sprockets have 15 teeth, but GZ125 has size 428 sprockets and chain and GZ250 has size 520 ones. Login or Register to Remove Ads
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06-03-2012, 03:59 AM	#45
rynr Member Join Date: Apr 2012 Location: Poland Posts: 75	Re: making one bike from two i'll try this, but my forks are 11 years old, maybe it's time to change the oil too and replace seal on the bottom before it starts leaking. Login or Register to Remove Ads
	0

06-05-2012, 07:56 AM	#46
CMS Senior Member Join Date: Nov 2007 Location: Southern Ohio Posts: 146	Re: making one bike from two Bike looks great, Bravo !! Terry __________________ You can never have enough motocycles 2017 Yamaha R -3 White 2013 Suzuki GW250 Black FSSNOC # 4953
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06-09-2012, 07:01 PM	#48
rynr Member Join Date: Apr 2012 Location: Poland Posts: 75	Re: making one bike from two I had an accident today, some idiot drove in front of me from minor road, from right side. Didn't have time or place to put motorbike to the ground (salvage) - just started handling. I'm quite okay - flipped on car mask and landed on legs. Bike needs new mudguard, little suspension straightening (loosing bolts put straight and tighten bolts) and at least headlamp ring... Here are a few photos done before this, and 1 after.
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06-09-2012, 08:03 PM	#49
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: making one bike from two Very glad to hear you have no injuries from the mishap. The bike is repairable or replaceable if need be. I would imagine the crash bars saved a lot of damage when the bike finally can to rest.
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06-10-2012, 10:39 AM	#50
rynr Member Join Date: Apr 2012 Location: Poland Posts: 75	Re: making one bike from two Well, crashbar didn't help because i rided straight into the front-left side of car, my front wheel stoped in car's slot between it's wheel and fender. That's why my fender is in many pieces. The bike stopped in the car and was in standing position, didn't fell on the ground.
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